PMID: 20629216Jul 16, 2010Paper

Recent advances in the synchronization of estrus and ovulation in dairy cows

The Journal of Reproduction and Development
K L Macmillan

Abstract

Synchronization programs have become standard components in the current breeding management of cows in the dairy herds of most dairy industries. Many are based on protocols that allow timed inseminations (TAI) so as to circumvent the practical difficulties associated with estrus detection. These difficulties are exacerbated in modern herds of high producing cows either because of increasing herd size in which individual animal monitoring is difficult and often subjective, or because small intensively managed herds are milked in robotic systems that minimize animal: staff interactions. Additional reasons arise from high producing cows having less obvious symptoms of estrus, partly because of housing systems combined with intensive feeding and milking, partly because of higher metabolic clearance rates of reproductive hormones like estradiol and partly because of the increasing prevalence of prolonged post-partum anestrus and reproductive tract pathology. The most recently developed programs include protocols for resynchronization following first or subsequent inseminations. These re-synchronization protocols may involve selected forms of hormonal intervention during the diestrous and pro-estrous periods following TAI, or followi...Continue Reading

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Citations

Sep 10, 2014·The Journal of Reproduction and Development·Irina Garcia-Ispierto, Fernando López-Gatius
Jun 20, 2012·FEBS Letters·Maximilian Hörner, Wilfried Weber
Jul 28, 2015·The Journal of Reproduction and Development·Fernando López-GatiusIrina Garcia-Ispierto
Sep 16, 2014·Reproduction in Domestic Animals = Zuchthygiene·M Saint-DizierS Chastant-Maillard
Feb 9, 2016·The Journal of Reproduction and Development·Miki SakataniNaoki Takenouchi
Oct 17, 2014·Tropical Animal Health and Production·Pougue Henri BayemiB M A Oswin Perera
Mar 8, 2012·Reproduction, Fertility, and Development·Alexander C O Evans, Siobhan W Walsh
Apr 17, 2019·Journal of Veterinary Research·Jędrzej M JaśkowskiKlaus-Peter Brüssow
Nov 25, 2020·Animals : an Open Access Journal From MDPI·Anna J KorzekwaRoland Kozdrowski

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