Introduction

Controlling estrous cycles (day 0=onset of estrus) by synchronizing estrus facilitates artificial insemination (AI) or natural service of a high percentage of breeding age or postpartum females. As a result, it also facilitates promulgation of superior genetics of progeny-tested sires of economic worth for continued livestock improvement. Some methods are also used to delay or prevent estrus in females, induce puberty, or initiate estrous cycles in postpartum or seasonally anestrous females.

Various hormones have been tested to control the estrous cycle of domestic farm species. These include compounds that: 1) lyse the corpus luteum (CL); 2) artificially elongate the luteal phase via feeding, drenching, or injecting a progestin, or administering intravaginal sponges or inserts, or body implants that deliver a progestin; 3) induce ovulation using gonadotropins; or 4) induce ovulation using combinations of several hormones.

100 Pregnancy Tips

100 Pregnancy Tips

Prior to planning pregnancy, you should learn more about the things involved in getting pregnant. It involves carrying a baby inside you for nine months, caring for a child for a number of years, and many more. Consider these things, so that you can properly assess if you are ready for pregnancy. Get all these very important tips about pregnancy that you need to know.

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