[Prospective studies on pregnancy following induced and spontaneous abortion of primigravidae and assessment of fertility. IV. report].

Prospects for imminent and spontaneous abortion were studied in three groups of probands. These included secundigravidae following induced abortion, secundigravidae after spontaneous abortion, and primigravidae. --Chronological distribution of abortion was determined for two periods of time, up to the 16th week of pregnancy and between the 17th and 27th weeks of pregnancy. Reference is made to correlations between abortion and cervical insufficiency. Poor prognosis in a group with a record of spontaneous abortions was compared with accumulation of functional bleeding in the same group. --An account is given also of the incidence of defective infants in all three groups, in the context of prematurity.