MANAGEMENT FACTORS INFLUENCING FERTILITY IN BEEF CATTLE BREEDING PROGRAMS

Artificial insemination (AI) provides a method to inseminate large numbers of females to a single sire or group of sires that have been selected and proven to produce offspring with economically relevant traits. Thus, genetic change in a herd can occur quickly through the use of AI. With natural service, herd bulls are also selected for economically relevant traits but are limited on the number of cows/heifers they can service during the breeding season. During the breeding season, a herd bull’s job is to detect cows/heifers in standing estrus and breed them at the appropriate time. For successful AI of cattle to occur, the producer (herd manager) must take the place of the herd bull in detecting the cows/heifers that are ready to be inseminated.

[1]  G. Perry,et al.  Ovarian follicle diameter at timed insemination and estrous response influence likelihood of ovulation and pregnancy after estrous synchronization with progesterone or progestin-based protocols in suckled Bos indicus cows. , 2010, Animal reproduction science.

[2]  T. Geary,et al.  Effects of flunixin meglumine on pregnancy establishment in beef cattle. , 2010, Journal of animal science.

[3]  G. Perry,et al.  Association Between Pre-Ovulatory Concentrations of Estradiol and Expression of Uterine Milk Protein Precursor, Inhibin Beta A, Period 1, Proenkephalin, and Receptors for Oxytocin, Progesterone, and Estradiol. , 2009 .

[4]  G. Perry,et al.  Effects of standing estrus and supplemental estradiol on changes in uterine pH during a fixed-time artificial insemination protocol. , 2008, Journal of animal science.

[5]  G. Perry,et al.  Association Between Preovulatory Concentrations of Estradiol and Expression of Uterine Milk Protein Precursor, Inhibin Beta A, and Proenkephalin. , 2008 .

[6]  G. Perry,et al.  Association Between Preovulatory Concentrations of Estradiol and Expression of Uterine Receptors for Oxytocin, Progesterone, and Estradiol. , 2008 .

[7]  G. Perry,et al.  Effect of preovulatory concentrations of estradiol and initiation of standing estrus on uterine pH in beef cows. , 2008, Domestic animal endocrinology.

[8]  M. Merrill,et al.  Effects of flunixin meglumine and transportation on establishment of pregnancy in beef cows. , 2007, Journal of animal science.

[9]  Matthew C Lucy,et al.  Relationship between follicle size at insemination and pregnancy success. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[10]  G. Perry.  Comparison of the Efficiency and Accuracy of Three Estrous Detection Methods to Indicate Ovulation in Beef Cattle 1 , 2005 .

[11]  J. Santos,et al.  The effect of embryonic death rates in cattle on the efficacy of estrus synchronization programs. , 2004, Animal reproduction science.

[12]  Bahman Shafii,et al.  Effect of simultaneous thawing of multiple 0.5-mL straws of semen and sequence of insemination on conception rate in dairy cattle. , 2004, Journal of dairy science.

[13]  G. Perry,et al.  Ability of intravaginal progesterone inserts and melengestrol acetate to induce estrous cycles in postpartum beef cows. , 2004, Journal of animal science.

[14]  G. Perry,et al.  Evaluation of a fixed-time artificial insemination protocol for postpartum suckled beef cows. , 2002, Journal of animal science.

[15]  P. Hansen,et al.  Effect of season and exposure to heat stress on oocyte competence in Holstein cows. , 2002, Journal of dairy science.

[16]  R W Rorie,et al.  Application of electronic estrus detection technologies to reproductive management of cattle. , 2002, Theriogenology.

[17]  G. Perry,et al.  Effect of follicle size at time of GnRH-induced ovulation on luteal function and fertility , 2002 .

[18]  M. Wiltbank,et al.  Follicular Deviation and Acquisition of Ovulatory Capacity in Bovine Follicles1 , 2001, Biology of reproduction.

[19]  D R Brown,et al.  Inclusion of an intravaginal progesterone insert plus GnRH and prostaglandin F2alpha for ovulation control in postpartum suckled beef cows. , 2001, Journal of animal science.

[20]  J. Hill,et al.  Endometrial Glands Are Required for Preimplantation Conceptus Elongation and Survival1 , 2001, Biology of reproduction.

[21]  W. R. Butler,et al.  Efficacy of an intravaginal progesterone insert and an injection of PGF2alpha for synchronizing estrus and shortening the interval to pregnancy in postpartum beef cows, peripubertal beef heifers, and dairy heifers. , 2001, Journal of animal science.

[22]  J. Stevenson,et al.  An alternative AI breeding protocol for dairy cows exposed to elevated ambient temperatures before or after calving or both. , 2001, Journal of dairy science.

[23]  C L Barnett,et al.  Effectiveness of GnRH plus prostaglandin F2alpha for estrus synchronization in cattle of Bos indicus breeding. , 2001, Journal of animal science.

[24]  P. Hansen,et al.  Development of cultured bovine embryos after exposure to high temperatures in the physiological range. , 2001, Reproduction.

[25]  G C Lamb,et al.  Synchronizing estrus and(or) ovulation in beef cows after combinations of GnRH, norgestomet, and prostaglandin F2alpha with or without timed insemination. , 2000, Journal of animal science.

[26]  J. Walton,et al.  Induction of ovulation in postpartum suckled beef cows: a review. , 2000, Theriogenology.

[27]  M. Diskin,et al.  Effect of acute nutritional restriction on incidence of anovulation and periovulatory estradiol and gonadotropin concentrations in beef heifers. , 1999, Biology of reproduction.

[28]  Faculdade Medicina Veterinaria.  SYNCHRONIZATION RATE, SIZE OF THE OVULATORY FOLLICLE, AND PREGNANCY RATE AFTER SYNCHRONIZATION OF OVULATION BEGINNING ON DIFFERENT DAYS OF THE ESTROUS CYCLE IN LACTATING DAIRY COWS , 1999 .

[29]  J. C. Whittier,et al.  Effects of a Timed Insemination Following Synchronization of Ovulation Using the Ovsynch or CO-Synch Protocol in Beef Cows , 1998 .

[30]  R Vishwanath,et al.  Estrus detection using radiotelemetry or visual observation and tail painting for dairy cows on pasture. , 1998, Journal of dairy science.

[31]  M. Wiltbank,et al.  Effect of time of artificial insemination on pregnancy rates, calving rates, pregnancy loss, and gender ratio after synchronization of ovulation in lactating dairy cows. , 1998, Journal of dairy science.

[32]  G D Niswender,et al.  Pregnancy rates of postpartum beef cows that were synchronized using Syncro-Mate-B or the Ovsynch protocol. , 1998, Journal of animal science.

[33]  D. Patterson,et al.  Effects of melengestrol acetate on onset of puberty, follicular growth, and patterns of luteinizing hormone secretion in beef heifers. , 1998, Biology of reproduction.

[34]  J. Burke,et al.  Evaluation of timed insemination during summer heat stress in lactating dairy cattle. , 1998, Theriogenology.

[35]  P. Hansen,et al.  Effects of timed insemination and supplemental beta-carotene on reproduction and milk yield of dairy cows under heat stress. , 1998, Journal of dairy science.

[36]  G. Foxcroft.  Mechanisms mediating nutritional effects on embryonic survival in pigs. , 2020, Journal of reproduction and fertility. Supplement.

[37]  P. Chenoweth.  Bull libido/serving capacity. , 1997, The Veterinary clinics of North America. Food animal practice.

[38]  F. López-Gatius.  Side of gestation in dairy heifers affects subsequent sperm transport and pregnancy rates after deep insemination into one uterine horn. , 1996, Theriogenology.

[39]  A. Peters.  Embryo mortality in the cow , 1996 .

[40]  T. Votta,et al.  Sperm motility hyperactivation facilitates penetration of the hamster zona pellucida. , 1995, Biology of reproduction.

[41]  M. Wiltbank,et al.  Synchronization of ovulation in dairy cows using PGF2α and GnRH , 1995 .

[42]  R. Meidan,et al.  Effect of heat stress on follicular development during the estrous cycle in lactating dairy cattle. , 1995, Biology of reproduction.

[43]  R L Nebel,et al.  Measuring efficiency and accuracy of detection of estrus. , 1994, Journal of dairy science.

[44]  W. R. Butler,et al.  Reduction of fertility and alteration of uterine pH in heifers fed excess ruminally degradable protein. , 1993, Journal of animal science.

[45]  P. H. Gutierrez,et al.  Investigating optimal bull:heifer ratios required for estrus-synchronized heifers. , 1993, Journal of animal science.

[46]  R. Hammerstedt.  Maintenance of bioenergetic balance in sperm and prevention of lipid peroxidation: a review of the effect on design of storage preservation systems. , 1993, Reproduction, fertility, and development.

[47]  S. Suarez,et al.  Hyperactivation enhances mouse sperm capacity for penetrating viscoelastic media. , 1992, Biology of reproduction.

[48]  G. Morgan,et al.  Endocrine events associated with endometrial function and conceptus development in cattle. , 1992, Reproduction, fertility, and development.

[49]  J. Jaeger,et al.  Growth and Reproductive Performance of Heifers Overwintered in Range or Drylot Environments , 1992 .

[50]  J. Whittier,et al.  Effect of a prostaglandin F2 alpha injection 96 hours after introduction of intact bulls on estrus and calving distribution of beef cows. , 1991, Journal of animal science.

[51]  P. L. Senger,et al.  Effect of group thawing on post-thaw viability of bovine spermatozoa packaged in .5-milliliter French straws. , 1991, Journal of animal science.

[52]  S. Fenton,et al.  Nonreturn rates of dairy cattle following uterine body or cornual insemination. , 1990, Journal of dairy science.

[53]  G. Schultz,et al.  Transition from maternal to embryonic control in early mammalian development: A comparison of several species , 1990, Molecular reproduction and development.

[54]  F. Provenza,et al.  Role of Experience in the Development of Foraging Skills of Lambs Browsing the Shrub Serviceberry , 1989 .

[55]  F. Provenza,et al.  Relationship between Plant Maturity and Foraging Experience of Lambs Grazing Hycrest Crested Wheatgrass , 1989 .

[56]  F. Provenza,et al.  The effect of experience on the foraging skill of lambs: Importance of plant form☆ , 1989 .

[57]  W. Thatcher,et al.  Influence of summer heat stress on pregnancy rates of lactating dairy cattle following embryo transfer or artificial insemination. , 1989, Theriogenology.

[58]  J. Goltz,et al.  The interaction of pH and cyclic adenosine 3',5'-monophosphate on activation of motility in Triton X-100 extracted bull sperm. , 1988, Biology of reproduction.

[59]  G. Morgan,et al.  Evidence for maternal regulation of early conceptus growth and development in beef cattle. , 1988, Journal of reproduction and fertility.

[60]  P. L. Senger,et al.  Influence of cornual insemination on conception in dairy cattle. , 1988, Journal of animal science.

[61]  K. Odde,et al.  Synchronization of estrus in beef cows with Norgestomet-Alfaprostol or Syncro-Mate B. , 1988, Theriogenology.

[62]  F. Provenza,et al.  Development of Dietary Choice in Livestock on Rangelands and its Implications for Management , 1988 .

[63]  R. Pearson,et al.  Impact of site of inseminate deposition and environmental factors that influence reproduction of dairy cattle. , 1988, Journal of dairy science.

[64]  L. Corah,et al.  Variation in conception rates following synchronization of estrus with melengestrol acetate and prostaglandin F2 alpha. , 1988, Journal of animal science.

[65]  F. Provenza,et al.  Diet learning by domestic ruminants: Theory, evidence and practical implications , 1987 .

[66]  J. Hurnik,et al.  Estrous behavior in confined beef cows. , 1987, Journal of animal science.

[67]  H. Hawk,et al.  Effect of unilateral cornual insemination upon fertilization rate in superovulating and single-ovulating cattle. , 1986, Journal of animal science.

[68]  C. Galina,et al.  Fertility trial in Zebu cattle after a natural or controlled estrus with prostaglandin F2 Alpha, comparing natural mating with artificial insemination. , 1985, Theriogenology.

[69]  P. L. Senger,et al.  Radiographic evaluation of bovine artificial inseminating technique among professional and herdsman-inseminators using .5- and .25-ml French straws. , 1984, Journal of animal science.

[70]  D. Carr,et al.  Inhibition of bovine spermatozoa by caudal epididymal fluid: II. Interaction of pH and a quiescence factor. , 1984, Biology of reproduction.

[71]  D. Carr,et al.  Inhibition of bovine spermatozoa by caudal epididymal fluid: I. Studies of a sperm motility quiescence factor. , 1984, Biology of reproduction.

[72]  H. Hawk.  Sperm survival and transport in the female reproductive tract. , 1983, Journal of dairy science.

[73]  W. Beal.  A note on synchronization of oestrus in post-partum cows with prostaglandin F2α and a progesterone-releasing device , 1983 .

[74]  J. R. Chenault,et al.  Fertilization failure and embryonic mortality in parous and nonparous beef cattle. , 1983, Journal of animal science.

[75]  S. Echternkamp,et al.  Hormonal asynchrony and embryonic development , 1982 .

[76]  B. Shea.  Evaluating the bovine embryo. , 1981, Theriogenology.

[77]  M. Diskin,et al.  Fertilization and embryonic mortality rates in beef heifers after artificial insemination. , 1980, Journal of reproduction and fertility.

[78]  G. Pearce,et al.  EFFECT OF EARLY FAMILIARIZATION WITH DIETARY SUPPLEMENTS ON THE SUBSEQUENT INGESTION OF MOLASSES-UREA BLOCKS BY SHEEP , 1980 .

[79]  G. Heersche,et al.  Synchronization of estrus in beef heifers with a norgestomet implant and prostaglandin F2alpha. , 1979, Theriogenology.

[80]  D. Jones,et al.  Synchronization of estrus in beef cattle: III. Field trials in heifers using a norgestomet implant and injections of norgestomet and estradiol valerate , 1978 .

[81]  J. C. Spitzer,et al.  Synchronization of estrus in beef cattle: II. Effect of an injection of norgestomet and an estrogen in conjunction with a norgestomet implant in heifers and cows , 1978 .

[82]  J. Fléchon,et al.  A scanning electron microscope study of the hatching of bovine blastocysts in vitro. , 1978, Journal of reproduction and fertility.

[83]  R. Morris,et al.  Pregnancy rates and non-return rates following artificial and natural breeding in dairy herds. , 1978, Australian veterinary journal.

[84]  P. Chenoweth,et al.  Reproductive efficiency of bulls in natural service: effects of male to female ratio and single- vs multiple-sire breeding groups. , 1977, Journal of the American Veterinary Medical Association.

[85]  Austin Cr.  Sperm fertility, viability and persistence in the female tract. , 1975 .

[86]  C. R. Austin.  Sperm fertility, viability and persistence in the female tract. , 1975, Journal of reproduction and fertility. Supplement.

[87]  J. Hill,et al.  The effects of undernutrition on ovarian function and fertility in beef heifers. , 1970, Biology of reproduction.

[88]  J. W. Macpherson.  Semen placement effects on fertility in bovines. , 1968, Journal of dairy science.

[89]  L. C. Ulberg,et al.  Embryo death resulting from adverse environment on spermatozoa or ova. , 1967, Journal of animal science.

[90]  B. W. Pickett,et al.  Influence of Freezing Methods, Extenders, and Storage Temperatures on Motility and pH of Frozen Bovine Semen, , 1963 .

[91]  E. J. Stone,et al.  Estrus, Estrous Cycles, Ovulation Time, Time of Service, and Fertility of Dairy Cattle in Louisiana , 1959 .

[92]  H. Rickard,et al.  Use of Mechanical Refrigeration in Preservation of Bull Semen , 1957 .

[93]  H. J. Bearden,et al.  Fertilization and Embryonic Mortality Rates of Bulls with Histories of Either Low or High Fertility in Artificial Breeding , 1956 .

[94]  L. C. Ulberg,et al.  Fertilization Rates and Embryonic Death Rates in Cows Bred to Bulls of Different Levels of Fertility , 1954 .

[95]  Mcnutt Sh,et al.  Studies on corpus luteum ablation and progesterone replacement therapy during pregnancy in the cow. , 1952 .

[96]  R. E. Nichols,et al.  Studies on corpus luteum ablation and progesterone replacement therapy during pregnancy in the cow. , 1952, American journal of veterinary research.