there was an increase in progesterone content per unit weight in ovine fetal cotyledons as gestation progressed : 17.0 +/- 4.7 ng/100 mg of wet tissue in ewes between 40 and 54 days of pregnancy ( n = 7 ) and 70.7 +/- 18.8 ( n = 9 ) between 100 and 118 days .
C0033308
progesterone
C0032961
gestation