Inhibin and activin subunits are differenzially expressed in endometrial cells and leukocytes during the menstrual cycle, in early pregnancy and in women using progestin-only contraception. - Jones,R.L.; Salamonsen,L.A.; Critchley,H.O.; Rogers,P.A.; Affandi,B.; Findlay,J.K. (Mol Hum Reprod, 2000)