Prolactin in amniotic fluid: its correlation with maternal plasma prolactin

Area of Science:

• Reproductive Endocrinology
• Maternal-Fetal Medicine

Background:

• Prolactin is a key hormone in pregnancy.
• Its role and concentration in amniotic fluid are not fully understood.

Purpose of the Study:

• To measure prolactin concentrations in amniotic fluid and maternal plasma during pregnancy.
• To investigate the relationship between amniotic fluid prolactin and pregnancy status.
• To compare amniotic fluid and plasma prolactin levels.

Main Methods:

• Radioimmunoassay was used to determine prolactin concentrations.
• Samples were collected from women with normal and complicated pregnancies.
• Amniotic fluid and plasma prolactin levels were measured.

Main Results:

• Amniotic fluid prolactin levels ranged from 36 to 1800 ng/ml in normal pregnancies.
• No specific pattern of prolactin concentration change was observed during normal pregnancy.
• No significant difference in amniotic fluid prolactin was found in complicated pregnancies.
• Amniotic fluid prolactin levels were approximately ninefold higher than plasma levels.
• No significant correlation was found between amniotic fluid and plasma prolactin.

Conclusions:

• Amniotic fluid prolactin concentrations exhibit wide variability in normal pregnancy.
• Amniotic fluid prolactin levels are substantially higher than maternal plasma levels.
• Amniotic fluid prolactin does not appear to correlate with plasma levels or pregnancy complications in this study.