rat dams were ovariectomized on day 3 of pregnancy and treated with corn oil ( 0.25 ml/day ) , progesterone ( 4 mg/day ) , cortisone acetate ( 2 or 10 mg/day ) , cortisone acetate ( 10 mg/day ) plus progesterone ( 4 mg/day ) or progesterone ( 4 mg/day ) plus oestrone ( 1 microgram/day ) from days 2 to 8 or 14 , followed by 6 to 11 days of treatment with progesterone ( 4 mg/day ) plus oestrone ( 1 microgram/day ) .
C0032961
pregnancy
C0033308
progesterone