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Prolactin in normal pregnancy: relationship of maternal, fetal, and amniotic fluid levels
Serum prolactin was measured simultaneously by a homologous radioimmunoassay in 92 parturients and their offspring at term, and in maternal serum and amniotic fluid during various stages of normal pregnancy. Serum levels of 208 +/- 8 ng. per millilter were found in maternal blood; the corresponding levels in the cord serum were 354 +/- 14 ng. per milliliter. Prolactin levels in amniotic fluid were found to be 2- to 10-fold higher than the corresponding levels of the mothers. The possible source of the amniotic fluid prolactin molecule, which is identical with the human pituitary molecule, is discussed.
Serum prolactin was measured simultaneously by a homologous radioimmunoassay in 92 parturients and their offspring at term, and in maternal serum and amniotic fluid during various stages of normal pregnancy. Serum levels of 208 +/- 8 ng. per millilter were found in maternal blood; the corresponding levels in the cord serum were 354 +/- 14 ng. per milliliter. Prolactin levels in amniotic fluid were found to be 2- to 10-fold higher than the corresponding levels of the mothers. The possible source of the amniotic fluid prolactin molecule, which is identical with the human pituitary molecule, is discussed.