doi: 10.1210/jcem-69-1-215.
Spontaneous, gonadotropin-releasing hormone-induced, and progesterone-inhibited pulsatile secretion of human chorionic gonadotropin in the first trimester placenta in vitro
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- PMID: 2659617
- DOI: 10.1210/jcem-69-1-215
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Spontaneous, gonadotropin-releasing hormone-induced, and progesterone-inhibited pulsatile secretion of human chorionic gonadotropin in the first trimester placenta in vitro
J Clin Endocrinol Metab.
1989 Jul.
Abstract
Using a multichannel superfusion apparatus, the secretion of human chorionic gonadotropin (hCG) was measured at 1-6 minute intervals in placental explants at 7-9 weeks of gestation. hCG was found to be secreted in distinct pulses (4-5 fold above baseline) every 11-23 minutes peak to peak. Addition of one minute pulses of GnRH analog significantly increased, whereas pulses of progesterone decreased, pulsatile hCG secretion.
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