Estradiol secretion by the ovary of 19-day-old hypophysectomized and sham-operated chick embryos |
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| Authors: | J P Weniger J Chouraqui A Zeis |
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| Institution: | Laboratoire de Zoologie et d'Embryologie Expérimentale de l'Université Louis-Pasteur, Strasbourg, France. |
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| Abstract: | The amounts of estradiol released into culture media by ovaries from 19-day-old hypophysectomized (decapitated) and sham-operated chick embryos were determined by RIA. Per single ovary, ovaries from decapitated embryos secreted slightly less estradiol than ovaries from sham-operated ones during a 4-h culture period (837 +/- 413 vs 935 +/- 378 pg), but this difference was not significant. On an ovarian weight basis, ovaries from decapitated embryos secreted slightly more estradiol than ovaries from sham-operated ones (1.15 vs 0.91 ng), but this difference was not significant either. It is concluded from these results that the hypophysis does not control estradiol secretion by the ovary in the 19-day-old chick embryo. |
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