intact pregnant rats and rats ovariectomized on day 20 of gestation and treated thereafter with oil , estradiol benzoate ( 5 micrograms/24 h ) , progesterone ( 5 mg/24 h ) , or estradiol and progesterone together had indwelling balloons inserted on day 20 for the recording of uterine response to either iv bolus injections or iv infusions of ot .
C0032961
gestation
C0014912
estradiol