Abstract
In the present study, we investigated the efficacy of human chorionic gonadotrophin (HCG) in the maintenance of pregnancy in adrenalectomized rats. Holtzman's strain albino rats were adrenalectomized on day 8 of pregnancy and at the same time were laparotomized to observe the number of implantations. Adrenalectomy on day 8 caused abortions or fetal resorption in almost all rats. Administration of 5 or 50 IU HCG in adrenalectomized rats, from day 8 through 14 or 19, was not able to maintain gestation, resulting in fetal resorption with many placentomas and placental scars. However, a single injection of 5 IU or 1 IU HCG administered on day 8 only maintained the pregnancy to full term in adrenalectomized rats. Hence, the present experiment indicates that replacement therapy of a single dose of 5 IU or 1 IU HCG might be sufficient for maintaining pregnancy in adrenalectomized rats.
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