[Contribution to the treatment of threatened abortion].

460 cases of threatened abortion were divided into 3 different treatment categories. Group A was treated with a combined antihistamine and antispasmodic, and Group B with tranquilizers and synthetic gestagens. Group C consisted of patients who refused therapy. The percentage of delayed abortions in group A was 79.3%, in group B 84.7% and in group C 54.8%. According to the x2-test, the difference between the treated and untreated groups is statistically significant. The mode of action of the prescribed drugs is substantiated and their effectiveness was compared with published data on other therapies. Complications of pregnancy, at delivery and during the puerperium were not more prevalent than in normal pregnancies. However, the percentage of premature births (22.9%) and of perinatal mortality (5.4%) was strikingly high. Accordingly, successfully treated threatened abortions are to be followed up as "risk" pregnancies and closely supervised as such. It is especially important to avoid a premature birth. The frequency of congenital defects and functional disturbances was 11.9%; their existence is independent of the type of therapy. Since the defects are usually of minor consequence and reversible, we advocate treatment of the threatened abortion.