High levels of fetal membrane activin beta A and activin receptor IIB mRNAs and augmented concentration of amniotic fluid activin A in women in term or preterm labor.

J Endocrinol. 1997 Jul;154(1):95-101

Authors: Petraglia F, Di Blasio AM, Florio P, Gallo R, Genazzani AR, Woodruff TK, Vale W