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Studies on amniotic prolactin: chromatographic pattern and correlation with the lecithin content
F Pansini1, C M Bergamini, B Bagni
1Department of Obstetrics and Gynecology, University of Ferrara, Italy.
Gynecologic and Obstetric Investigation
|January 1, 1989
Summary
Amniotic fluid prolactin levels correlate differently with lecithin in early versus late pregnancy. This suggests amniotic prolactin is produced locally, with distinct regulatory mechanisms throughout gestation.
Area of Science:
- Reproductive Endocrinology
- Maternal-Fetal Medicine
- Biochemistry
Background:
- Prolactin is a key hormone in pregnancy.
- The source and regulation of prolactin in amniotic fluid are not fully understood.
- Lecithin is a marker for fetal lung maturity.
Purpose of the Study:
- To measure amniotic fluid prolactin and lecithin concentrations in normal pregnancy.
- To investigate the relationship between prolactin and lecithin across trimesters.
- To explore the origin and regulation of amniotic prolactin.
Main Methods:
- Measurement of prolactin and lecithin in amniotic fluid samples.
- Analysis of samples from 20 normal pregnant women.
- Correlation analysis between hormone levels and gestational trimester.
Main Results:
- Prolactin in amniotic fluid exists primarily as a low-molecular-weight form ('little' prolactin).
- Amniotic prolactin showed a negative correlation with lecithin in the 2nd trimester.
- A positive correlation between prolactin and lecithin was observed in the 3rd trimester.
Conclusions:
- Amniotic prolactin is likely synthesized locally ('in situ').
- Distinct regulatory mechanisms control prolactin production during different stages of pregnancy.
- Findings suggest a dynamic role for prolactin in fetal development and amniotic fluid regulation.