[Contraceptive activity of combinations of steroids and antiadrenergic preparations]

Experiments were conducted on mature female rats. Simultaneous administration through a tube for 14 days, daily, of mestranol (0.04 mg/kg) and megestrol acetate (0.8 mg/kg) gave no significant contraceptive effect, whereas the use of steroid preparations in the same doses in combination with antiadrenergic substances--dopegit (100 mg/kg) or pyrroxan (10 mg/kg) prevented pregnancy effectively.