The presence of lactogen receptors in human chorion laeve.

Lactogen receptors have been identified in human chorion laeve and possibly placenta but not other periplacental tissues. The receptors show the same hormonal specificity, and similar binding parameters (affinity 0.47 x 10(9) l/m, capacity 175 fmol3/mg) to lactogen receptors in mammary gland and liver. The presence of these receptors, suggests they may play a role in mediating an action(s) of amniotic fluid prolactn in chorion laeve, such as osmoregulation.