Considerations Related to Heifer Management. Heifer Management CONTROL OF ESTRUS IN HEIFERS
|
|
- Charleen Montgomery
- 5 years ago
- Views:
Transcription
1 Considerations Related to Heifer Management CONTROL OF ESTRUS IN HEIFERS DJ Patterson, NT Martin, JM Thomas, and MF Smith Division of Animal Sciences University of Missouri Heifer Management Effect of calving date on the number of cows calving the subsequent year Heifers that conceive earlier during their first breeding season Stay in the herd longer Produce more pounds of beef over their lifetime Cows failing to calve (%) d 1- d 21- d 41-6 d 61-8 d 81- d Day of calving season (Burris and Priode, 198) Relationship between time of calving and lifetime production of beef cows Reproductive management prior to the first breeding season Early Late Average lifetime weaning weight (kg) 1. Target weight 2. Reproductive tract scores (RTS) 3. Pelvic measurements 4. Estrous synchronization. Sire selection (BW or CE EPD) Adapted from Lesmeister et al.,
2 Reproductive management prior to the first breeding season 1. Target weight 2. Reproductive tract scores 3. Pelvic measurements 4. Estrous synchronization. Sire selection (BW or CE EPD) Accuracies make a difference Prebreeding evaluation of heifers Weight Reproductive tract scores Pelvic area Reproductive Tract Scores Endocrine and Ovarian Changes Associated with Puberty Onset Uterine RTS Horns Immature, < mm diameter, 1 no tone -2 mm diameter, 2 no tone -2 mm diameter, 3 slight tone 4 mm diameter, good tone Ovarian Length (mm) Ovarian Height (mm) Ovarian Width (mm) 1 8 Ovarian Structures No palpable follicles mm follicles mm follicles > mm follicles, Cl possible Estradiol secretion Estradiol feedback LH secretion Prepubertal Peripubertal Pubertal + > mm diameter >32 1 Corpus luteum present Follicle diameter Reproductive tract score From Anderson et al., 1991 Adapted from Day and Anderson,1998; Anderson et al., Infantile Reproductive Tract Score (RTS) Summary RTS 2 prepubertal (> d from puberty) 3 prepubertal 1,3 (< d from puberty) 4 cycling (follicular phase) cycling (luteal phase) n Pelvic Height Weight (lb) (cm) 697 c 94 a 6 b 733 d 7 d 13.9 a 14.1 a 14. b 14.7 c 14.7 c Pelvic Width (cm).9 a 11.2 a 11.4 b 11.7 c 11.7 c Pelvic Area (cm 2 ) 12 a 18 a 166 b 172 c 172 c a, b, c, d Numbers with different superscripts within a column differ (P <.) Patterson and Bullock, Estrous Response (%) 4 a 66 b 76 c 83 d 86 d SHOW-ME-SELECT REPLACEMENT HEIFER PROGRAM RTS and FT pregnancy rate for,126 heifers Spring - Fall 11 RTS n ,71 1,3 1,816 FT PR.% 36.% 48.% 2.1% 9.4% Thomas et al., 12 2
3 Neonatal exposure to progesterone and estradiol on reproductive tract in beef heifers Heifer Management Age at b Response a Birth Day 21 Day 4 Control Uterocervical weight c (g) d 123. d 1.3 d e Myometrial area (mm 2 ) g g g h Endometrial area (mm 2 ) 29.9 i 32.4 i 37.7 i 4.4 j Gland Density (hits/mm 2 ) d 38.3 e e f Uterine luminal protein (mg/flush) 2.8 d 2.9 d 2.3 d 4.9 e RTS: 4 to 6 weeks before breeding or 2 weeks before estrous synchronization Begin synchronization when % of the heifers have RTS of 4 or From Bartol et al., 199 Why use estrous synchronization? Why use estrous synchronization? More heifers will become pregnant early during the breeding season Progestin-based programs can induce estrous cyclicity in pre- or peripubertal heifers (MGA, or CIDR) Pregnancy rates of heifers in natural service versus synchronized and ed herds RTS Total Exposed NS 1 (n) S 2 (n) , , 21-d pregnancy rate NS (%) S (%) 38 a 31 a 41 a 48 a a 44 a 1, 2 NS=natural service; S= synchronized and ed a, b P<. Adapted from Randle and Patterson, 42 a 2 b 8 b 62 b 64 b 61 b % Reasons Beef Producers in the U.S. Cite for not Using Reproductive Procedures Estrus synchronization Artificial insemination Pregnancy diagnosis Time/labor Cost Complicated Other From NAHMS Survey, 8 3
4 MGA-Based Protocols for Heifers was the preferred method of estrus synchronization in beef heifers (Brown et al., 1986; Deutscher et al., ; Lamb et al., ). MGA 17 to 19 days 1 14 day 33 MGA prior to Natural Service or prior to MGA (14 days) Sub-fertile estrus days Natural service Breeding program Natural service No. heifers Estrous response Synchronized conception rate Synchronized pregnancy rate / % /424 79% 2414/334 72% 2414/424 7% % of herd in estrus Considerations pertaining to long-term MGA feeding () MGA (Natural service) 4
5 Estrous Response Experimental Design MGA (14 days) MGA (87 days) Estrus Response (%) /31 77 % 16/ 3 % 4/7 7 % /14 71 % 28/31 9 % 26/ 87 % days 1st injection 2nd injection Short-term MGA Total Long-term MGA Patterson et al., 1992 Ovarian Morphology Normal Abnormal Short-term MGA 31/31 % /31 %* Long-term MGA 19/ 63 % 11/ 37 %* Abnormal = Luteinized follicular cyst * P <.1
6 Conception Rate Pregnancy Rate Conception Rate (%) /24 7 % 12/16 7 % 3/4 7 % 6/ 6 % 21/28 7 % 1 st injection 2 nd injection Total Short-term MGA 18/26 69 % Long-term MGA Pregnancy Rate (%) /31 9 % Short-term MGA 27/ 9 % Long-term MGA s How do MGA- and CIDR-based protocols compare in heifers? MGA days Heat detection and CIDR days 36 Heat detection and Mallory, et al., 9 Estrous distribution after MGA or CIDR Estrus, % NR Interval after progestin removal, treatment d Mean interval to estrus and variance for interval to estrus after MGA or CIDR Overall mean interval to estrus, h 14-day CIDR ± 12.6 a 37.8 ± 11.2 b Estrus, % 14-day CIDR- Variance for interval to estrus 9172 a 136 b a,b Means within rows with different superscripts differ (P <.1) NR Interval after progestin removal, treatment d Mallory, et al., 9 6
7 Estrous response after Distribution of estrus after 14-day CIDR- Overall estrous response 17/ 18/196 8 a 92 b day CIDR- Estrous cycling 13/14 138/11 88 x 91 2 Prepubertal 3/46 42/4 76 c,y 93 d a,b Means within rows with different superscripts differ (P =.1) c,d Means within rows with different superscripts differ (P =.3) x,y Means within rows with different superscripts tend to differ (P =.6) Estrus, % NR Mallory, et al., 9 Interval after administration, h Mean interval to estrus and variance for interval to estrus after Overall mean interval to estrus, h Variance for interval to estrus after 14-day CIDR- 7.4 ± ± a 282 b a,b Means within rows with different superscripts differ (P =.1) Conclusion Estrous response (P =.1) and synchrony of estrus (P <.1) were significantly improved among heifers assigned to the 14- day CIDR- protocol. Pre-synchronization with a 14-d CIDR followed 16 d later with provides an effective alternative for use in synchronizing estrus in replacement beef heifers. There were no differences between treatments for synchronized conception or pregnancy rates. Mallory, et al., 9 Mallory, et al., 9 The Multi-State CIDR Trial h Detect estrus & h Detect estrus & Lamb et al., h FT h FT Lamb et al., 6 7
8 Estrus 233/383 61% Estrus 236/372 63% FT /133 37% 282/16 % FT 1/131 39% 289/3 7% Multi-state CIDR Trial at CIDR insertion did not improve pregnancy rates after FT h Detect estrus & FT 29/2 49% h Detect estrus & FT 282/31 3% at CIDR insertion did not alter the percentage of heifers detected in estrus or the distribution of estrus after A combination of detecting estrus and before cleanup enhanced pregnancy rates over FT h h Lamb et al., 6 CO-Synch + CIDR w/ T at 4h vs w/ T at 72h How do long- and short-term CIDR-based protocols compare in heifers? CO-Synch + CIDR h CIDR (14 days) days days h day Busch et al., 7 CO-Synch + CIDR Total Diff. pregnancy Fixed-time pregnancy rate Pre/peripubertal 13/21 (62%) 11/23 (48%) 24/44 (%) + 14 % Estrous cycling 4/87 (62%) x /86 (47%) y 94/173 (4%) + 1 % x,y P=.3 Busch et al., 7 Combined 67/8 (62%) x 1/9 (47%) y 118/217 (4%) + 1 % x,y P=.2 vs CO-Synch + CIDR Synchronizing beef heifers with the protocol resulted in: Increased response to (P =.1) Higher estrous response (P =.6) Reduced variance associated with the interval from to estrus and ovulation (P <.1) Significantly higher FT pregnancy rates (P =.2) = 62% CO-Synch + CIDR = 47% Reduced variance associated with the interval from FT to the subsequent return to estrus (P <.) Busch et al., 7; Leitman et al., 8 8
9 How do the and 14-day CIDR- protocols compare? How do the and 14-day CIDR- protocols compare? Estrous response Interval to and synchrony of estrus Synchronized pregnancy rate Leitman et al., 9 s Distribution of estrus after CIDR d d day CIDR- CIDR d Estrus, % day CIDR NR Interval after administration, h Leitman et al., 9 Leitman et al., 9 14-day CIDR- vs. Estrous response was similar between treatments (98%, 14-day CIDR-; 94%, ; P =.43) Mean interval to estrus was 7 h earlier (P =.1) for 14-day CIDR- treated heifers compared to CIDR Select treated heifers Heifers assigned to 14-day CIDR- had a greater (P <.1) synchrony of estrus compared to heifers assigned to Pregnancy results 14- day CIDR- conception rate 78/13 (8) x 92/137 (67) y pregnancy rate 78/143 () a 92/1 (66) b Final pregnancy rate 116/143 (81) 113/1 (81) x,y Means within rows with different superscripts tend to differ (P =.9) a,b Means within rows with different superscripts differ (P =.) Leitman et al., 9 9
10 Conclusion The administration of following CIDR removal in the protocol is not required to facilitate an improvement in the synchrony of estrus in beef heifers. How do the and 14-day CIDR- protocols compare on the basis of pregnancy rates resulting from fixed-time? Leitman et al., 9 s Combined Estrus Distribution 14-day CIDR- 4 Leitman et al. (9a) Leitman et al. (9b) CIDR 9 days 7 days 3 Mallory et al. (9) n = 424 heifers hr 2 14-day CIDR- 1 CIDR days 66 hr NR Mallory et al., 11 n = 424 heifers on HeatWatch Fixed-time pregnancy rates Summary pregnancy rate Estrous cycling Prepubertal 14-day CIDR- 98/ / 1 a 62 b 83/18 2/162 3 c 63 d 1/ /38 8 Pregnancy rates tended to be higher (P =.7) for 14-day CIDR- compared to CIDR Select treated heifers. Final pregnancy rates did not differ between treatments. a,b Means within rows with different superscripts tend to differ (P =.7) c,d Means within rows with different superscripts tend to differ (P =.6) Mallory et al., 11 Mallory et al., 11
11 Conclusion 14-day CIDR- is effective in synchronizing estrus prior to FT in beef heifers. Leitman et al. (9a,b) Mallory et al. (9a) Heat detection Mallory et al. (9b) --- Cooperating herds (KS, MO, MT) --- Totals Fixed-time 241/422 7% /422 7% 124/ 62% 16/246 6% 1729/266 6% 14-d CIDR- protocol for heifers CIDR hr day Combining health & reproduction in a single management step. 6-day CIDR 6-day CIDR CIDR (6 d) h Summary & Conclusions Comparison of estrous response and fertility in beef heifers after treatment with various estrus synchronization protocols. Synchronized pregnancy Estrous response rate based on detected estrus d MGA Select CIDR- (d6) 14-day CIDR- 1129/12 433/499 /28 896/ /422 87% 87% 7% 92% 93% 768/12 28/ /8 77/ /422 9% 6% 39% 9% 7% Heat detect & fixed-time 7-day CIDR-: 84 hr Select Synch + CIDR: 84 hr 14 d CIDR-: 72 hr 14 d MGA + : 72hr performed at predetermined fixed times with no estrus detection 7-day CIDR- CO-Synch + CIDR CO-Synch + CIDR 14-day CIDR- 6 hr 6 hr 4 hr 72 hr 66 hr 282/17 % 289/4 7% 48/77 62% 2/79 66% 28/2 49% 282/31 3% 1/9 47% 616/1 8% 1729/266 6% 11
12 Take Home Points Long-term CIDR-based protocols enhance synchrony of estrus in estrous cycling and preor peripubertal heifers compared to short-term CIDR-based or MGA-based protocols. Acknowledgements Pregnancy rates resulting from fixed-time in beef heifers are expected to be higher following treatment with long-term CIDRbased protocols because of improvements in synchrony of estrus following treatment. Acknowledgements Faculty, Students, & Staff Faculty Regional Extension Livestock Specialists Mike Smith Roger Eakins Matthew Lucy Mark Ellersieck Students MU Farms & Centers Jon Bader David McAtee Nicole Leitman Jon Schreffler Daniel Mallory Stoney Coffman Neal Martin Dennis Hamilton Justin Nash Randall Smoot Daniel Schafer Jacob Stegner Jordan Thomas Dallas Wilson Stacey Wood (Follis) Research Specialists & Postdoctoral Fellows Dan Busch Naoto (Freddie) Kojima Acknowledgements Financial Support Acknowledgements Product support Pfizer Merial TEVA Semen Support ABS Global Acclerated Genetics Genex Select Sires, Inc. Acknowledgements Cooperators Circle A Angus 4-M Ranch MFA, Inc. MU Thompson Research Center Genex (Stan Lock) 12
PHENOTYPIC DATA COLLECTION FOR REPRODUCTIVE TRAITS IN REPLACEMENT BEEF HEIFERS D.J. Patterson and J.E. Decker University of Missouri
PHENOTYPIC DATA COLLECTION FOR REPRODUCTIVE TRAITS IN REPLACEMENT BEEF HEIFERS D.J. Patterson and J.E. Decker University of Missouri BACKGROUND. Heifers that calve early during their first calving season
More informationVariation in Duration of Estrus. Dr. Michael Smith, Un. of Missouri August 17, Overview. Ovarian Structures Graffian follicle.
Dr. Michael Smith, Un. of Missouri August 17, 15 Overview Establishment of Pregnancy in Beef Cattle: Application of Basic Principles M.F. Smith 1, G.A. Perry, K.G. Pohler 1, S.E. Dickinson 1, and D.J.
More informationOverview. Mike Smith presentation Oct. 8, 2014 ARSBC PHYSIOLOGICAL PRINCIPLES UNDERLYING SYNCHRONIZATION OF ESTRUS
Mike Smith presentation ct., 1 PHYSILGICAL PRINCIPLES UNDERLYING SYNCHRNIZATIN F ESTRUS M.F. Smith, G.A. Perry, J.A. Atkins, K.G. Pohler, R.M. Wallace, S.E. Dickinson, A.. Gatea and D.J. Patterson Division
More informationPHYSIOLOGICAL PRINCIPLES UNDERLYING SYNCHRONIZATION OF ESTRUS
PHYSIOLOGICAL PRINCIPLES UNDERLYING SYNCHRONIZATION OF ESTRUS M.F. Smith, G.A. Perry, J.A. Atkins, M.E. Risley, D.C. Busch, and D.J. Patterson Division of Animal Sciences, University of Missouri, Columbia
More informationOverview PHYSIOLOGICAL PRINCIPLES UNDERLYING SYNCHRONIZATION OF ESTRUS
PHYSILGICAL PRINCIPLES UNDERLYING SYNCHRNIZATIN F ESTRUS M.F. Smith, G.A. Perry, J.A. Atkins, E.M. Jinks, K.G. Pohler, and D.J. Patterson Division of Animal Sciences, University of Missouri, Columbia Department
More informationComparison of long-term controlled internal drug release-based protocols to synchronize estrus and ovulation in postpartum beef cows 1
Published November 25, 2014 Comparison of long-term controlled internal drug release-based protocols to synchronize estrus and ovulation in postpartum beef cows 1 J. M. Nash,* D. A. Mallory,* M. R. Ellersieck,
More informationReplacement Heifer Development. Changing Minds for the Change In Times Brian Huedepohl, DVM Veterinary Medical Center Williamsburg, Iowa
Replacement Heifer Development Changing Minds for the Change In Times Brian Huedepohl, DVM Veterinary Medical Center Williamsburg, Iowa Many changes have occurred that have brought about how some beef
More informationProceedings, The Applied Reproductive Strategies in Beef Cattle Workshop, September 5-6, 2002, Manhattan, Kansas
Proceedings, The Applied Reproductive Strategies in Beef Cattle Workshop, September 5-6, 2002, Manhattan, Kansas HEIFER DEVELOPMENT AND REODUCTIVE TRACT SCORING FOR A SUCCESSFUL HEIFER OGRAM:THE SHOW-ME-SELECT
More informationUnderstanding Postpartum Anestrus and Puberty
Understanding Postpartum Anestrus and Puberty Dr. Jack C. Whittier, Colorado State University Dr. Jim Berardinelli, Montana State University Dr. Les Anderson, University of Kentucky 2008 Robert E. Taylor
More informationEffects of Day of Cycle at Initiation of a Select Synch/CIDR + Timed-artificial Insemination Protocol in Suckled Angus and Brangus Cows
Effects of Day of Cycle at Initiation of a Select Synch/CIDR + Timed-artificial Insemination Protocol in Suckled Angus and Brangus Cows Regina Esterman 1 Brad Austin Steaven Woodall Erin McKinniss Joel
More informationPurebred Cattle Series Synchronization of Estrus in Cattle
Agriculture and Natural Resources FSA3120 Purebred Cattle Series Synchronization of Estrus in Cattle Tom R. Troxel Professor and Associate Department Head Animal Science Arkansas Is Our Campus Visit our
More informationEstrous Synchronization Systems for Beef Heifers. Bob L. Larson, DVM, PhD, ACT
Estrous Synchronization Systems for Beef Heifers Bob L. Larson, DVM, PhD, ACT Synchronization Systems Progestogens Act to suppress estrus and ovulation First products used to attempt control of the estrous
More informationA Thesis Presented to. the Faculty of the Graduate School. at the University of Missouri. In Partial Fulfillment. of the Requirements for the Degree
TIMING GNRH ADMINISTRATION WITH SPLIT-TIME ARTIFICIAL INSEMINATION FOLLOWING ADMINISTRATION OF CIDR-BASED PROTOCOLS TO SYNCHRONIZE ESTRUS AND OVUALTION IN BEEF HEIFERS AND COWS A Thesis Presented to the
More informationControlled Breeding Programs for Heifers
Controlled Breeding Programs for Heifers Kira Macmillan and Marcos G. Colazo Livestock Research Section, Alberta Agriculture and Forestry, Edmonton, Alberta, Canada. Introduction E-mail: marcos.colazo@gov.ab.ca
More informationSYNCHRONIZATION OF FOLLICULAR WAVE EMERGENCE, LUTEAL REGRESSION, AND OVULATION FOR FIXED-TIME ARTIFICIAL INSEMINATION IN BEEF COWS AND HEIFERS
SYNCHRONIZATION OF FOLLICULAR WAVE EMERGENCE, LUTEAL REGRESSION, AND OVULATION FOR FIXED-TIME ARTIFICIAL INSEMINATION IN BEEF COWS AND HEIFERS A Dissertation by KYLE JEFFREY STUTTS Submitted to the Office
More informationReproductive Vaccination- Deciphering the MLV impact on fertility
Reproductive Vaccination- Deciphering the MLV impact on fertility Safety Decision Efficacy Prebreeding Vaccination of Cattle should Provide fetal & abortive protection (BVD and BoHV-1) Not impede reproduction
More informationLuteolysis and Pregnancy Outcomes in Dairy Cows after Treatment with Estrumate or Lutalyse
Luteolysis and Pregnancy Outcomes in Dairy Cows after Treatment with Estrumate or Lutalyse J. S. Stevenson and A. P. Phatak Summary In Experiment, lactating dairy cows (n =,230) in 6 herds were treated
More informationESTROUS SYNCHRONIZATION AND THE CONTROL OF OVULATION. PCattle PSmall ruminants PPigs
ESTROUS SYNCHRONIZATION AND THE CONTROL OF OVULATION PCattle PSmall ruminants PPigs BASICS P Prostaglandins P Progesterone and progestogens P Gonadotropin-releasing hormone (GnRH) PEstrogens (off-label
More informationFACTORS THAT INFLUENCE FERTILITY IN NATURAL AND SYNCHRONIZED BREEDING PROGRAMS
Proceedings, Applied Reproductive Strategies in Beef Cattle November 12 and 13, 2005, Texas A&M University, College Station FACTORS THAT INFLUENCE FERTILITY IN NATURAL AND SYNCHRONIZED BREEDING PROGRAMS
More informationRegina Esterman 1 Brad Austin Steaven Woodall Erin McKinniss Joel Yelich
Effectiveness of Cloprostenol Sodium vs. Dinoprost Tromethamine in a GnRH/CIDR + PGF 2α Synchronization Protocol in Angus, Brahmans, and Brahman Angus Cows Regina Esterman 1 Brad Austin Steaven Woodall
More informationNorth Florida Research and Education Center, University of Florida, Marianna, FL 2
Administration of Recombinant Bovine Somatotropin Prior to Fixed-time Artificial Insemination and the Effects on Pregnancy Rates and Embryo Development in Beef Heifers N. Oosthuizen 1, P. L. P. Fontes
More informationEvaluation of two progestogen-based estrous synchronization protocols in yearling heifers of Bos indicus Bos taurus breeding
Available online at www.sciencedirect.com Theriogenology 75 (2011) 1699 1707 www.theriojournal.com Evaluation of two progestogen-based estrous synchronization protocols in yearling heifers of Bos indicus
More informationAcutely Restricting Nutrition Causes Anovulation and Alters Endocrine Function in Beef Heifers
Acutely Restricting Nutrition Causes Anovulation and Alters Endocrine Function in Beef Heifers F.J. White, L.N. Floyd, C.A. Lents, N.H. Ciccioli, L.J. Spicer, and R.P. Wettemann Story in Brief The effects
More informationMP383 Synchronization of Estrus in Cattle
MP383 Synchronization of Estrus in Cattle University of Arkansas, U.S. Department of Agriculture, and County Governments Cooperating Table of Contents Introduction The Estrous Cycle Products Used for Estrous
More informationBeef Cattle Handbook
Beef Cattle Handbook BCH-2320 Product of Extension Beef Cattle Resource Committee Estrous Synchronization for Beef Cattle Gene H. Deutscher, Extension Beef Specialist, University of Nebraska This Fact
More informationErin McKinniss 1 Regina Esterman Steaven Woodall Brad Austin Joel Yelich
Comparison of Two Progestogen Based Estrous Synchronization Protocols and Cloprostenol Sodium vs. Dinoprost Tromethamine in Suckled Post Partum Cows and Yearling Heifers of Bos Indicus Bos Taurus Breeding
More informationPennsylvania Premier Bred Heifer Program
Pennsylvania Premier Bred Heifer Program Requirements for Program Eligibility: Heifers must be nominated by July 15th. Identification Requirements: All heifers are required to arrive with an inserted 840
More informationReproduction is the single most important factor for profitable beef production. Rick Funston, University of Nebraska. Heifer Development Systems
Rick Funston, University of Nebraska 6/19/14 Heifer Development Systems Rick Funston Reproductive Physiologist UNL Beef Research and Extension BBR GSL PHREC NEREC ARDC KCWL WEC BEEF SYSTEMS RESEARCH Lincoln
More informationSynchronizing Heats in Beef Cows and Heifers
Oklahoma Cooperative Extension Service ANSI-3166 Synchronizing Heats in Beef Cows and Heifers Glenn Selk Extension Animal Reproduction Specialist Objectives Provide a summary of some of the most popular
More informationInfluence of Experimentally- induced clinical mastitis on Reproductive Performance of Dairy Cattle
Influence of Experimentally- induced clinical mastitis on Reproductive Performance of Dairy Cattle Dr. Mitch Hockett Department of Animal Science North Carolina State University Characteristics of Mastitis
More informationComparison of the Efficiency and Accuracy of Three Estrous Detection Methods to Indicate Ovulation in Beef Cattle 1
Comparison of the Efficiency and Accuracy of Three Estrous Detection Methods to Indicate Ovulation in Beef Cattle 1 George A. Perry 2 Department of Animal and Range Sciences BEEF 2005-24 12 Summary The
More informationSecond Insemination Breeding Strategies for Dairy Cows
Second Insemination Breeding Strategies for Dairy Cows Matthew C. Lucy Department of Animal Sciences, University of Missouri, Columbia MO 65211 Email: lucym@missouri.edu Take Home Message 8 There are a
More informationInternational Journal of Modern Pharmaceutical IJMPR Research
IJMPR 2017, 1(1), 21-28 International Journal of Modern Pharmaceutical Research www.ijmpronline.com ISSN: 2319-5878 International Journal of Modern Pharmaceutical IJMPR Research Review Article REVIEW ON
More informationReproductive Management Considerations for Herd Expansion CLIFF LAMB
Reproductive Management Considerations for Herd Expansion CLIFF LAMB 1 2 3 SEMEN SALES IN USA AND BRAZIL FROM 1995 TO 2014 16 14 USA Brazil Units of semen, x 10 6 12 10 8 6 4 2 0 1995 1996 1997 1998 1999
More informationEffects of Nutritional Environment on Percentage of Mature Weight at which Crossbred Heifers of Varying Proportion of Brahman Breeding Attain Puberty
Effects of Nutritional Environment on Percentage of Mature Weight at which Crossbred Heifers of Varying Proportion of Brahman Breeding Attain Puberty K. A. Weekley, T. T. Marshall, and D. D. Hargrove Department
More informationThe Effect of Ram Exposure on Uterine Involution and Luteal Function During the Postpartum Period of Hair Sheep Ewes in the Tropics 1
The Effect of Ram Exposure on Uterine Involution and Luteal Function During the Postpartum Period of Hair Sheep Ewes in the Tropics 1 R. W. Godfrey 2, M. L. Gray, and J. R. Collins Agricultural Experiment
More informationANESTRUS BUFFALO TREATMENT SUCCESS RATE USING GNRH
: 4545-4550 ISSN: 2277 4998 ANESTRUS BUFFALO TREATMENT SUCCESS RATE USING GNRH YAGHOUBAZIZIYAN, FARDGHRAKHANLU 1 AND SAMAD MOSAFERI 2* 1: Department of Veterinary Medicine, Tabriz Branch, Islamic Azad
More informationUsing performance data and reproductive measurements to predict fertility in replacement beef heifers
Using performance data and reproductive measurements to predict fertility in replacement beef heifers Arthur L. Jones,* Roy D. Berghaus, Matthew W. Studstill, Jacob S. Segers, Jason D. Duggin, # Patsie
More informationreproduction Cow-calf operations: calendar of operations Animal Science 144 Beef Cattle & Sheep Production R. D. Sainz Lecture 05
Cow-calf operations: reproduction Animal Science 144 Beef Cattle & Sheep Production R. D. Sainz Lecture 05 Cow-calf operations: calendar of operations 1 2 Anatomy - female Anatomy - male The estrous cycle
More informationManaging Reproduction in the Cowherd
Managing Reproduction in the Cowherd The 30 day game changer My Background Raised on family ranch near Poteau, OK OSU 1985 TAMU 1988 ABS 28 years Family practices what we preach on home ranch Reproductive
More informationThe he mpor mp tanc e of e Es E trous Detection on Re tion -ins insemination of Lac tating Dair Dair Cows
The Importan nce of Estrous Detection on Re-insemination of Lactating Dairy Cows Ricardo C. Chebel The Need for Time ely Re-Insemination of Lactating Dairy Cows Only ~ 35-45% of cows are pregnant after
More informationC.A. Peterson, R.N. Summers, F.A. Ireland, T.F. Lock, D.B. Faulkner, and D.J. Kesler SUMMARY
ESTRUS SYNCHRONIZATION AND PREGNANCY RATES OF BEEF COWS ADMINISTERED MELENGESTEROL ACETATE THE TEN DAYS BEFORE ESTRUS SYNCHRONIZATION WITH SYNCRO-MATE B C.A. Peterson, R.N. Summers, F.A. Ireland, T.F.
More informationComparison in Effect of Heatsynch with Heat Detection Aids and CIDR-Heatsynch in Dairy Heifers
Reprod Dom Anim 45, 500 504 (2010); doi: 10.1111/j.1439-0531.2008.01277.x ISSN 0936-6768 Comparison in Effect of with Heat Detection Aids and CIDR- in Dairy Heifers M Yusuf 1, T Nakao 1, C Yoshida 1, ST
More informationACCEPTED MANUSCRIPT REVISED. School of Veterinary Science, The University of Queensland, Gatton, Queensland,
Theriogenology 1 REVISED 2 School of Veterinary Science, The University of Queensland, Gatton, Queensland, 3 4 5 6 7 8 9 10 11 12 1 3 14 15 16 17 18 Australia Comparison of the pregnancy rates and costs
More informationNORGESTOMET IMPLANTS ENHANCE EMBRYO SURVIVAL IN POSTPARTUM COWS: A PRELIMINARY REPORT
NORGESTOMET IMPLANTS ENHANCE EMBRYO SURVIVAL IN POSTPARTUM COWS: A PRELIMINARY REPORT M. L. Rosmarin, T. F. Lock, J. M. Dahlquist, T. G. Nash, D. B. Faulkner, and D. J. Kesler SUMMARY Objectives of this
More informationEffects of MGA on Prepubertal Beef Heifers
Effects of MGA on Prepubertal Beef Heifers L.M. Butler,' H.L. Miller,2 D.D. Zalesky,= D.M. Marshall,' K.VanderWal,5 and C. Moret5 Department of Animal and Range Sciences CAlTLE 96-6 Summarv Materials Methods
More informationEstrumate Prostaglandin in Beef Herds
Estrumate Prostaglandin in Beef Herds See the Difference with Potent Performance Here s Why You Should Use Estrumate Prostaglandin Percent of Drug Not Cleared or Eliminated in Cattle by Time 5 Percent
More informationEffectiveness of a Presynchronization Program Implemented on a Modern Dairy Facility. R. E. Thommen
Effectiveness of a Presynchronization Program Implemented on a Modern Dairy Facility By R. E. Thommen Dairy Science Department College of Agriculture CALIFORNIA POLYTECHNIC STATE UNIVERSITY San Luis Obispo
More informationABSTRACT. postpartum multiparous beef cattle have always been difficult to re-breed. Estrous
ABSTRACT MABRY, LAUREN KELLY. Comparison of Estrous Synchronization Protocols in Beef Cattle. (Under the direction of Dr. C.S. Whisnant and Dr. D. H. Poole). Maintaining a precise calving interval poses
More informationThe estrous cycle. lecture 3. Dr. Wafer M. Salih Dr. Sadeq J. Zalzala Dr. Haydar A. AL-mutar Dr. Ahmed M. Zakri
The estrous cycle lecture 3 By Dr. Wafer M. Salih Dr. Sadeq J. Zalzala Dr. Haydar A. AL-mutar Dr. Ahmed M. Zakri The estrous cycle Definition Sexual Puberty in the females is defined as the age at the
More informationImproving reproduction in NZ dairy herds
Improving reproduction in NZ dairy herds Scott McDougall, Tom Brownlie, Melvin de Boer, Chris Compton Cognosco, Anexa Animal Health, Morrinsville, New Zealand smcdoug@ahc.co.nz Herd Fertility Is like a
More informationControl of Reproduction
Reproductive Management Control of Reproduction The success of a cow-calf operation depends upon the number of calves raised, weaned, and marketed each year. The following are some of the most important
More informationWHY DO DAIRY COWS HAVE REPRODUCTIVE PROBLEMS? HOW CAN WE SOLVE THOSE REPRODUCTIVE PROBLEMS? Jenks S. Britt, DVM 1. Why Manage Reproduction?
WHY DO DAIRY COWS HAVE REPRODUCTIVE PROBLEMS? HOW CAN WE SOLVE THOSE REPRODUCTIVE PROBLEMS? Jenks S. Britt, DVM 1 Why Manage Reproduction? The following table gives reproductive information from the DHIA
More informationABSTRACT. The use of fixed-time artificial insemination (FTAI) provides producers with
ABSTRACT MUTH, ASHLEIGH MARIE. Comparison of Pregnancy Rates in Beef Cattle Following a 7- day Co-Synch Treatment with Once- or Twice-used CIDR Devices. (Under the direction of Dr. C. S. Whisnant). The
More informationHeifer Reproduction. A Challenge with a Payback. Jerry Bertoldo, DVM. Extension Dairy Specialist NWNY Team CCE/PRO-DAIRY
Heifer Reproduction A Challenge with a Payback Jerry Bertoldo, DVM Extension Dairy Specialist NWNY Team CCE/PRO-DAIRY Reproduction is a Luxury Function Priority to become pregnant lies below maintenance
More informationTHE EFFECTS OF FEEDING HIGH-LINOLEIC SAFFLOWER SEEDS ON ESTRUS SYNCHRONIZATION IN BEEF HEIFERS. Kaitlyn Claire Spence
THE EFFECTS OF FEEDING HIGH-LINOLEIC SAFFLOWER SEEDS ON ESTRUS SYNCHRONIZATION IN BEEF HEIFERS by Kaitlyn Claire Spence A thesis submitted in partial fulfillment of the requirements for the degree of Master
More informationLivestock and Poultry Environmental Learning Center Webcast Series March 28, 2008
Antibiotic and Hormone Use in Livestock Production Paul Ebner Assistant Professor Department of Animal Sciences Purdue University Presentation Outline Antibiotics and Hormones a. How they are used b. Quantities
More informationApproaches to Enhancing Lambing Rate from Out of Season Breeding
Approaches to Enhancing Lambing Rate from Out of Season Breeding Presenter: Marlon Knights, PhD Associate Professor, Reproductive Physiology Division Animal and Nutritional Sciences Davis College of Agriculture
More informationSYNCHRONIZATION OF FOLLICULAR WAVE EMERGENCE AND OVULATION FOR REPRODUCTIVE BIOTECHNOLOGIES
MARCELO F.MARTINEZ ET AL. 26 SYNCHRONIZATION OF FOLLICULAR WAVE EMERGENCE AND OVULATION FOR REPRODUCTIVE BIOTECHNOLOGIES Marcelo F. Martínez, Gabriel A. Bó, Reuben J. Mapletoft Western College of Veterinary
More informationBoosting the Calf Crop Percentage in Your Beef Herd
Boosting the Calf Crop Percentage in Your Beef Herd Webinar held February 25, 2014, 8:00-9:00pm CST Can t hear us? - Are your speakers/headset turned on and the volume up? - Do you need to unmute your
More informationSimple ways to use genetics to improve reproduction in beef cattle David Johnston
Simple ways to use genetics to improve reproduction in beef cattle David Johnston Animal Genetics and Breeding Unit University of New England, Armidale, Australia Presentation to Gyranda Open Day 2016
More informationEffects of PGF2 α and GnRH on Reproductive Performance of Cattle and Buffaloes in Thailand and Philippines
Available online http://www.ijat-aatsea.com ISSN 1686-9141 Effects of PGF2 α and GnRH on Reproductive Performance of Cattle and Buffaloes in Thailand and Philippines Virapol Jamsawat, Felomino V. Mamuad
More informationTHIS ARTICLE IS SPONSORED BY THE MINNESOTA DAIRY HEALTH CONFERENCE.
THIS ARTICLE IS SPONSORED BY THE MINNESOTA DAIRY HEALTH CONFERENCE. ST. PAUL, MINNESOTA UNITED STATES OF MINNESOTA SYNCHRONIZATION PROGRAMS FOR Al IN HEIFERS Brad Seguin, DVM, MS, PhD, Diplomate ACT Jerry
More informationReproductive Management. of Beef Cattle Herds. Reproductive Management. Assessing Reproduction. Cow and Heifer Management
Reproductive Management of Beef Cattle Herds For a cow-calf operation, good reproductive rates are critical to operational success and profitability. It is generally expected that each breeding-age female
More informationUPDATE ON OVULATION-CONTROL PROGRAMS FOR ARTIFICIAL INSEMINATION OF LACTATING DAIRY COWS. J. S. Stevenson
Dairy Research 2005 UPDATE ON OVULATION-CONTROL PROGRAMS FOR ARTIFICIAL INSEMINATION OF LACTATING DAIRY COWS J. S. Stevenson Summary Use of timed AI programs has become commonplace on most dairy farms
More informationFALL BRED HEIFER SALE. Saturday, April 30 Noon. Featuring 140 certified heifers. Coffeyville Livestock Market Coffeyville, KS
FALL BRED HEIFER SALE Featuring 40 certified heifers Saturday, April 30 Noon Coffeyville Livestock Market Coffeyville, KS Sunflower supreme replacement heifers Jim & Donna Bates head SimAngus Dan Bussinger
More informationESTRUS SYNCHRONIZATION AND CALVING EASE AMONG FIRST CALF HEIFERS. D.G. Landblom and J.L. Nelson
28 ESTRUS SYNCHRONIZATION AND CALVING EASE AMONG FIRST CALF HEIFERS D.G. Landblom and J.L. Nelson Managing heifer replacements so they will calve as two year olds with a minimum of difficulty has been,
More informationUseful Contacts. Archie Ballantyne Monitor Farmer
Central Scotland Dairy Monitor Farm Auchenheath Farm, Lanarkshire ML11 9XA Meeting report: Fertility With John Cook from Valley Ag Software & Charles Marwood and Neil Laing, Clyde Vet Group Useful Contacts
More informationCEVA products for reproduction management
CEVA products for reproduction management 1 Prostaglandin ENZAPROST-T A complete range of products GnRH Ovarelin (Cystorelin) Prid Delta Suitable for different protocols Synchronization programs for beef
More information7/21/2010. Artificial Insemination the injection of semen from a male into the vagina of a female by a chosen tool...
Artificial Insemination, Reproductive Cycles, and Heat Detection Canadian Dexter Cattle Association Annual General Meeting August 14, 2010 Trevor DeVries tdevries@uoguelph.ca What is AI? Artificial Insemination
More informationSTEPHANIE L. PULLEY-JONES Post Oak Road Cell: (731) Nacogdoches, TX Office: (936)
STEPHANIE L. PULLEY-JONES 3924 Post Oak Road Cell: (731) 514-9156 Nacogdoches, TX 75956 Office: (936) 468-4571 Jonessl19@sfasu.edu Education Ph.D., Reproduction Physiology, Department of Animal Science
More informationShow-Me-Select Bred Heifer Sale
Show-Me-Select Bred Heifer Sale Crossbred & Purebred Spring-Calving Heifers Friday, December 8, 2017 7:00 P.M. Farmington Livestock Auction 109 BRED HEIFERS AVAILABLE: 1600 Woodlawn Dr., Farmington, MO
More information268 J. Anim. Sci Vol. 92, E-Suppl. 2/J. Dairy Sci. Vol. 97, E-Suppl. 1
Physiology and Endocrinology: Advances in Estrous Synchronization 0536 Detrimental effect of long term progestin-based protocol on oocyte quality and embryonic development in indigenous goats. C. Navanukraw*,
More informationOptimising reproductive performance of beef cows and heifers
Optimising reproductive performance of beef cows and heifers David A. Kenny 1 & Michael G. Diskin 2 Animal and Bioscience Research Department, Animal and Grassland Research and Innovation Centre, 1 Grange,
More information2009 MN Cattle Feeder Days Jolene Kelzer University of Minnesota Beef Team
2009 MN Cattle Feeder Days Jolene Kelzer University of Minnesota Beef Team 101.8 M total US cattle and calves (July 1) Down 1% from 2008 (103.3 M) 11.6 M total US cattle on feed (July 1) Down 5% from 2008
More informationShow-Me-Select Bred Heifer Sale
Show-Me-Select Bred Heifer Sale Crossbred & Purebred Spring-Calving Heifers Friday, December 7, 2018 7:00 P.M. Farmington Livestock Auction 1600 Woodlawn Dr., Farmington, MO 63640 79 BRED HEIFERS AVAILABLE:
More informationField solution for the Artificial Insemination of Ethiopian Sheep Breeds
Ethiopian Sheep and Goat Value Chain Development Field solution for the Artificial Insemination of Ethiopian Sheep Breeds Reproductive package to effectively vehicle improved genetics from the communities
More informationTHE ECONOMIC EFFECTS OF AN OESTRUS SYNCHRONISATION PROTOCOL USING PROSTAGLANDIN AND REPRODUCTIVE TRACT SCORING IN BEEF HEIFERS IN SOUTH AFRICA
THE ECONOMIC EFFECTS OF AN OESTRUS SYNCHRONISATION PROTOCOL USING PROSTAGLANDIN AND REPRODUCTIVE TRACT SCORING IN BEEF HEIFERS IN SOUTH AFRICA D E HOLM 2006 THE ECONOMIC EFFECTS OF AN OESTRUS SYNCHRONISATION
More informationEstrous Synchronization in Lactating Cows
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Range Beef Cow Symposium Animal Science Department December 1993 Estrous Synchronization in Lactating Cows Doug L. Hixon
More informationDairy Industry Overview. Management Practices Critical Control Points Diseases
Dairy Industry Overview Management Practices Critical Control Points Diseases Instructor Contact Information: Hans Coetzee Office: I-107 I FAH&M Building Phone: 785-532 532-4143 Email: jcoetzee@vet.ksu.edu
More informationSTEAVEN A.WOODALL, JR.
EFFECT OF LONG-TERM MELENGESTROL ACETATE TREATMENTS ON FOLLICLE DYNAMICS AND RESPONSE TO GONADOTROPIN-RELEASING HORMONE AND PROSTAGLANDIN F 2α SYNCHRONIZATION TREATMENTS IN Bos indicus Bos taurus HEIFERS
More informationCopyright is owned by the Author of the thesis. Permission is given for a copy to be downloaded by an individual for the purpose of research and
Copyright is owned by the Author of the thesis. Permission is given for a copy to be downloaded by an individual for the purpose of research and private study only. The thesis may not be reproduced elsewhere
More informationFactors Affecting Calving Difficulty and the Influence of Pelvic Measurements on Calving Difficulty in Percentage Limousin Heifers
yield from the nine-hr separation group was intermediate between the six- and 12-hr separation groups. These data suggest that more milk is produced in the first six hr of separation time than the latter
More informationUse of a synthetic progestogen in combination with a superovulatory. treatment for induction of synchronized estrus in seasonally anovular ewes.
Introduction Ewes & Progestogen - 1998 Sheep Day Report Use of a synthetic progestogen in combination with a superovulatory treatment for induction of synchronized estrus in seasonally anovular ewes. D.A.
More information2017 Consignment Sale Guidelines
2017 Consignment Sale Guidelines MORAA, c/o Approved: January 1, 2017 Version 3.1 (Revised 12/28/2015) Page 1 GENERAL GUIDELINES 1. Cattle Condition and Appearance: a. ALL cattle will be a Body Condition
More informationWYOMING PREMIUM HEIFER PROGRAM
WYOMING PREMIUM HEIFER PROGRAM This joint venture between the University of Wyoming s Department of Animal Science, the Wyoming Business Council s Agribusiness Division, and the Wyoming Stock Growers Association
More informationSongklanakarin J. Sci. Technol. 40 (4), , Jul. Aug Original Article
Songklanakarin J. Sci. Technol. 40 (4), 904-908, Jul. Aug. 2018 Original Article Effect of controlled internal drug release device and progesterone sponge on short-term estrus synchronization in Zandi
More informationESTRUMATE, LUTALYSE AND SYNCHROMATE-B COMPARED FOR SYNCHRONIZING HEAT CYCLES IN BEEF HEIFERS BY D. G. Landblom and J. L. Nelson
ESTRUMATE, LUTALYSE AND SYNCHROMATE-B COMPARED FOR SYNCHRONIZING HEAT CYCLES IN BEEF HEIFERS BY D. G. Landblom and J. L. Nelson Artificial insemination affords the stockman a tremendous potential for genetic
More informationSYNCHRONIZATION OF OESTRUS AND OVULATION IN BEEF HEIFERS
SYNCHRONIZATION O OESTRUS AND OVULATION IN BEE HEIERS B Y D. R. LAMOND* Summary orty Shorthorn heifers were removed from pasture, trucked 100 miles, a n d placed in yards. They were fed a ration containing
More informationADVANCED FERTILITY DAY MARTIN BEAUMONT, SHORN HILL FARM
ADVANCED FERTILITY DAY MARTIN BEAUMONT, SHORN HILL FARM 8600 MILK PER COW PER YEAR PRODUCTION MILK PROFILE AND PRODUCTION HEIFERS HOUSED IN SEPARATE GROUP AND AVERAGING 28LITRES/DAY COWS AVERAGING 30 LITRES
More informationSongklanakarin Journal of Science and Technology SJST R1 Vajdi Hokmabad
The effect of Controlled Internal Drug Release device (CIDR) and progesterone sponge on short-term estrus synchronization in Zandi ewes during the breeding season Journal: Songklanakarin Journal of Science
More informationZOETIS INC. 333 PORTAGE STREET, KALAMAZOO, MI, Telephone: Customer Service: Website:
ZOETIS INC. 333 PORTAGE STREET, KALAMAZOO, MI, 49007 Telephone: 269-359-4414 Customer Service: 888-963-8471 Website: www.zoetis.com Every effort has been made to ensure the accuracy of the information
More information2017 SOUTHWEST VIRGINIA BCIA INFLUENCED BRED HEIFER SALE RULES & REGULATIONS
2017 SOUTHWEST VIRGINIA BCIA INFLUENCED BRED HEIFER SALE RULES & REGULATIONS The Southwest Virginia BCIA-Influenced Bred Heifer Sale has been initiated to provide a source of high quality, commercial bred
More information2013 SOUTHWEST VIRGINIA BCIA INFLUENCED BRED HEIFER SALE RULES & REGULATIONS
2013 SOUTHWEST VIRGINIA BCIA INFLUENCED BRED HEIFER SALE RULES & REGULATIONS The Southwest Virginia BCIA-Influenced Bred Heifer Sale has been initiated to provide a source of high quality, commercial bred
More informationRELATIONSHIPS AMONG WEIGHTS AND CALVING PERFORMANCE OF HEIFERS IN A HERD OF UNSELECTED CATTLE
RELATIONSHIPS AMONG WEIGHTS AND CALVING PERFORMANCE OF HEIFERS IN A HERD OF UNSELECTED CATTLE T. C. NELSEN, R. E. SHORT, J. J. URICK and W. L. REYNOLDS1, USA SUMMARY Two important traits of a productive
More informationE. Alava, M. Hersom, J. Yelich 1
Effect of Adding Rumen Degradable Protein to a Dried Distillers Grain Supplement on Growth, Body Composition, Blood Metabolites, and Reproductive Performance in Yearling and Heifers E. Alava, M. Hersom,
More informationShow-Me-Select Bred Heifer Sale
Show-Me-Select Bred Heifer Sale Crossbred & Purebred Heifers Mostly Angus & Angus Cross heifers with a few BWF and Simmental December 9, 2017 at 12:30 PM F & T Livestock Market, Hwy 24 South, Palmyra,
More informationCase Study: Dairy farm reaps benefits from milk analysis technology
Case Study: Dairy farm reaps benefits from milk analysis technology MARCH PETER AND SHELIA COX became the first dairy farmers in the UK to install a new advanced milk analysis tool. Since installing Herd
More informationTIMELY INFORMATION Agriculture & Natural Resources
ANIMAL SCIENCES SERIES TIMELY INFORMATION Agriculture & Natural Resources September 2011 Trichomoniasis prevention and control 1 Soren Rodning, DVM, MS, Extension Veterinarian and Assistant Professor 2
More informationSTUDY THE RESPONSES OF PROGESTERONE ADMINISTRATION ON RESUMPTION OF CYCLICITY ON POST-PARTUM ANESTRUS BUFFALOES
Original Article STUDY THE RESPONSES OF PROGESTERONE ADMINISTRATION ON RESUMPTION OF CYCLICITY ON POST-PARTUM ANESTRUS BUFFALOES Deepak Suvarn 1, C. Singh 1 and M.M. Ansari 2,* ABSTRACT The aim of the
More information