title: Relationships between the number of small follicles prior to superovulatory treatment and superovulatory response in Holstein cows.
abstract: In order to determine relationships between the number of small follicles prior to superovulatory treatment and superovulatory response, a total of 55 superovulations were induced in Holstein cows. The ovaries were examined ultrasonographically once 0-1.5 days before the initiation of superovulatory treatment. The number of small follicles 3-6 mm in diameter on both ovaries before superovulatory treatment was found to be significantly correlated with the numbers of corpora lutea after superovulation (r = 0.440, P < 0.001), total ova recovered (r = 0.503, P < 0.001) and transferable embryos recovered (r = 0.482, P < 0.001). These results indicate that a single ultrasonographic examination of follicles 3-6 mm in diameter prior to superovulatory treatment can be utilized to predict superovulatory response.
authors.affiliation: Tokachi Livestock Management, Hokkaido, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kawamata
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D003338:Corpus Luteum / Q000187:drug effects / Q000502:physiology; D015237:Dinoprost / Q000494:pharmacology; D004622:Embryo, Mammalian; D004971:Estrus; D005260:Female; D005640:Follicle Stimulating Hormone / Q000494:pharmacology; D007315:Insemination, Artificial / Q000379:methods / Q000662:veterinary; D008297:Male; D006080:Ovarian Follicle / Q000000981:diagnostic imaging / Q000187:drug effects / Q000502:physiology*; D010053:Ovary / Q000000981:diagnostic imaging / Q000187:drug effects / Q000502:physiology; D011247:Pregnancy; D012044:Regression Analysis; D013480:Superovulation; D014463:Ultrasonography
chemical_list: D005640:Follicle Stimulating Hormone; D015237:Dinoprost