cells from mid-luteal phase of the menstrual cycle secreted progesterone , as measured by accumulation of this hormone in the incubation medium , and responded to the addition of 100 ng hcg/ml with a marked increase in progesterone secretion significantly above basal level ( 63.7 +/- 13.1 versus 24.7 +/- 5.5 ng progesterone/ml/5 x 10 ( 4 ) cells/3 hr , x +/- s.e. , n =6 ; p less than 0.05 ) .
C1327616
secreted
C0007634
cells