Mechanisms linking nutrition and reproduction in postpartum cows.

摘要: The reproductive physiology of postpartum cows is different from that heifers because the combined effects past pregnancy and lactation. Neither lactation nor has a major effect on fertility when calving free disease moderate. Postpartum beef in good body condition have conception rates nearly equivalent to those virgin once their uteri are involuted they initiate ovarian cycles. However, will experience infertility nutrient requirements for maintenance exceed intake (postpartum cows) or nutrients specifically partitioned toward dairy cows). subsequent loss fat occurs either case variety processes reproduction becomes less efficient. mechanisms lead abnormal nutritionally compromised cattle been investigated intensively. Much effort focused nature signal (endocrine otherwise) controls pituitary secretion LH FSH, response ovary other independent gonadotrophins. Reproductive studies ruminants tended follicular development this focus relates back solving problem anoestrus. Less work done nutrition early embryo, health which may be predetermined by factors affecting oocyte within preovulatory follicle. Few examined uterine function cattle. Solutions probably arise approaches include traditional as well more modern genomic proteomic technologies.