title: Observations on the influence of high level feeding on the ovarian activity and fertility in dairy cows.
abstract: Cows on high and low feeding levels were submitted to palpation of the ovaries and recording of the presence and size of follicles at various days of the cycle. A mid-cycle rise in follicular activity was apparent and for which the nonovulating ovary was responsible. High level feeding stimulated ovarian activity in each of the 2 ovaries throughout the cycle and follicular activity commenced earlier in the ovulating ovary on high level feeding than on low level feeding. A larger number of inseminations per conception was required by cows on high level feeding on low level feeding. The effect of ovarian activity on fertility is discussed.
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle; D004971:Estrus; D005260:Female; D005298:Fertility; D006080:Ovarian Follicle / Q000502:physiology; D010053:Ovary / Q000502:physiology*; D011247:Pregnancy