cells were dispersed from samples of myometrium , endometrium , allantois , chorion and amnion from sheep at day 50 , days 130-135 of pregnancy , and at term , in labour , and were incubated in the presence of pregnenolone and 20 alpha-dihydroprogesterone as potential precursors for progesterone production , and oestrone sulphate and androstenedione as potential precursors for oestrogen production .
C0012311
20
C0033308
progesterone