Secretion of Androgen by the Sparrow Ovary Following Stimulation with Pregnant Mare Serum *
نویسندگان
چکیده
Numerous experimental data support the idea that ovarian tissue in mammals secretes androgenic hormone in addition to the female sex hormones.2'4'14 Similar observations have been made on the starling,"5 the night heron,9 and the English sparrow.8' 15 In the case of the sparrow the evidence is based on the observation that the bill of the female darkens appreciably during the breeding season or when the ovary is stimulated to full activity by injections of pregnant
منابع مشابه
Photoperiod-dependent regulation of inhibin in Siberian hamsters: II. Regulation of inhibin production and secretion by pregnant mare serum gonadotropin.
Inhibin production differs in ovaries of Siberian hamsters (Phodopus sungorus) exposed to long days (LD) or short days (SD). We believe that seasonal differences in serum follicle-stimulating hormone contribute to this difference. However, given the profound photoperiodic differences in follicle maturation, serum gonadotropins alone may not account for all of the observed differences in inhibin...
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It has been known ever since the early investigations with gonadotrophins that the response of the bird to these substances is different from that of the mammal. In the bird, the testis is much more responsive to any type of stimulation than is the ovary, while in the mammal the reverse seems to be true. It was also shown relatively early that the chorionic gonadotrophins secreted in the urine ...
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ورودعنوان ژورنال:
- The Yale Journal of Biology and Medicine
دوره 13 شماره
صفحات -
تاریخ انتشار 1941