Induction of multiple ovulation in the cow with single injections of FSH and HCG.
A gonadotrophin regimen was developed to induce a high incidence of double and triple ovulations in the beef cow using a single injection of FSH on Day 16 followed by a low dose of HCG on the day of oestrus. Conception rate was not affected by gonadotrophin treatment and 1/9 cows experiencing multiple ovulations gave birth to twin calves.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D006063:Chorionic Gonadotropin / Q000008:administration & dosage* / Q000494:pharmacology; D004971:Estrus; D005260:Female; D005298:Fertility / Q000187:drug effects; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage*; D008297:Male; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy; D011372:Progestins / Q000008:administration & dosage / Q000494:pharmacology
D006063:Chorionic Gonadotropin; D011372:Progestins; D005640:Follicle Stimulating Hormone