progesterone , 20alpha-dihydroprogesterone , estrone and estradiol-17beta concentrations were estimated by radioimmunoassay in blood plasma from uterine , uteroovarian and femoral veins of rhesus monkeys ( macaca mulatta ) on days 22 , 49 , 128 and 160 of gestation .
C0014912
estradiol-17beta
C0032961
gestation