Studies on Pituitary-ovarian Endocrine Relationships During the Breeding Season, Seasonal Anestrus, and Postpartum Anestrus in Ewes |
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21 days activity administration amount anestrous ewes anestrous season animals autopsy average birth blood born bred breeding season castration caused cells changes compared complex containing continuous control ewes decrease diameter doses effect Effect of Suckling Endo estrogen estrous cycle estrus et al ewe lambs Experiment Experimental factors female five FSH concentration gonadectomy gonadotropin greater groups heat hormone horn hypothalamus increased injections intact interval July June killed laparotomy Left length levels light male mean Mechanisms method months non-suckled normal noted number of follicles observed occur onset ovarian ovulation percent performed period pituitary FSH pituitary gland postpartum anestrus present rats release remaining ovary removed Results Right secreted serum sheep shown significant significantly species stage studied suckling surgery Table thesis throughout tion tissue Total follicular fluid treated treatment unilateral ovariectomy uterine weight