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  • Title: Suppression of luteal and placental function in pregnant baboons with agonist analogs of luteinizing hormone-releasing hormones.
    Author: Vickery BH, McRae GI, Stevens VC.
    Journal: Fertil Steril; 1981 Nov; 36(5):664-8. PubMed ID: 6458515.
    Abstract:
    Implantation of pelleted agonistic analogs of luteinizing hormone-releasing hormone (LH-RH) into six pregnant baboons, ranging between 14 and 21 days after mating in individual animals, resulted in two abortions: one at 39 and the other at 67 days after mating. Plasma progesterone levels were low in treated animals through the 23rd day after mating, in spite of rising levels of plasma chorionic gonadotropin. Plasma levels of progesterone then rose rapidly to normal in five of six animals. Plasma estradiol levels were low from treatment on in the late-aborting animal but were normal until 5 days before delivery in the early abortant. The profile of circulating chorionic gonadotropin was truncated in treated animals, which may be the first indication of a paradoxical effect of LH-RH agonist on the trophoblast.
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