Factors affecting calving interval.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D004967:Estrogens / Q000494:pharmacology; D004971:Estrus / Q000502:physiology; D005260:Female; D005298:Fertility / Q000502:physiology*; D007047:Hysterosalpingography; D010053:Ovary / Q000601:surgery; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology; D014599:Uterus / Q000187:drug effects / Q000502:physiology
D004967:Estrogens; D011374:Progesterone