Effect of partial decapitation (hypophysectomy) on 17 beta-estradiol secretion by the chick embryo ovary.
Ovaries of equally matched partially decapitated (hypophysectomized) and sham-operated (at 42 h of incubation) 11 1/2-day-old chick embryos, i.e. embryos as identical as possible as regards body size and other morphological features, were compared with respect to the amounts of 17 beta-estradiol secreted during a 4 h-culture period. The 17 beta-estradiol secretion rate was very significantly lower in the decapitated than in the control embryos. This result suggests that the hypophysis controls 17 beta-estradiol secretion of the ovary in the 11 1/2-day old chick embryo.
Weniger
J P
JP
Laboratoire de Zoologie et d'Embryologie expérimentale, Université Louis Pasteur, Strasbourg, France.
Chouraqui
J
J
Zeis
A
A
D000818:Animals; D002642:Chick Embryo; D004958:Estradiol / Q000378:metabolism*; D005260:Female; D007016:Hypophysectomy; D009924:Organ Culture Techniques; D010053:Ovary / Q000378:metabolism*; D010902:Pituitary Gland / Q000502:physiology*; D011863:Radioimmunoassay; D012636:Secretory Rate
D004958:Estradiol