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Circulating bioactive inhibin levels during human pregnancy
J P Qu1, L Vankrieken, C Brulet
1Department of Obstetrics and Gynecology, University of Louvain, Brussels, Belgium.
The Journal of Clinical Endocrinology and Metabolism
|April 1, 1991
Summary
Serum inhibin levels significantly increase throughout human pregnancy, rising by 237% from week 4 to week 38. These findings indicate that circulating inhibin is a valuable marker for monitoring pregnancy progression.
Area of Science:
- Reproductive Endocrinology
- Biochemistry
Background:
- Inhibin plays a crucial role in reproductive processes.
- Understanding inhibin dynamics during pregnancy is essential for monitoring fetal development and maternal health.
Purpose of the Study:
- To quantify bioactive inhibin levels in pregnant women's serum.
- To investigate the changes in serum inhibin concentrations during different stages of human pregnancy.
Main Methods:
- Bioactive inhibin was measured using a sensitive ovine pituitary cell culture system.
- Serum samples from 103 pregnant women (4-38 weeks gestation) were analyzed.
- Quality control was performed using serum from 38-week pregnant women.
Main Results:
- Serum inhibin levels ranged from 0.02-5.28 U/mL.
- A significant progressive increase in serum inhibin was observed from 4 to 38 weeks of gestation (r = 0.988; P < 0.001).
- Inhibin levels peaked at 38 weeks (5.33 U/mL), a 237% increase from week 4, with an average increase rate of 14.51% every 2-4 weeks.
Conclusions:
- Circulating inhibin is a reliable marker for human pregnancy.
- Inhibin levels correlate strongly with gestational age.
- Monitoring inhibin may provide insights into pregnancy status.