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The crucial participation of hormones in reproduction and fertility is the most complicated story in endocrinology, because it involves several organ systems; gametes as well as hormones; two classes of receptors and intracellular signals; and a myriad of environmental factors such as seasonal signals and, of course, the nearby presence of a conspecific carrier of the opposite gamete type. As complicated...
In adult male rats, serum luteinizing hormone (LH) rises within a few hours of castration. By contrast, in adult female rats, serum LH does not increase reliably until 4–6 d after ovariectomy. The release of gonadotropin-releasing hormone (GnRH) declines in female rats postovariectomy, suggesting an increase in inhibition of the release of GnRH. We investigated whether differences in γ-aminobutyric...
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