to obtain an understanding of the sex steroid hormonal milieu during early gestation , the concentrations of estradiol-17 beta and progesterone were measured in endometria and reproductive tract luminal fluids collected during the post-ovulatory period ( days 2 to 6 ) of conception , and of non-mated menstrual cycles of the rhesus monkey ( macaca mulatta ) .
C0035150
reproductive
C0009637
conception