[The effect of induced abortion in adolescence on the manifestations of spontaneous abortion, premature labor and birth weight].

An experimental group of adolescents having become pregnant after induced abortion (n = 320) were compared with 514 primigravid adolescents, 391 women 20-24 years old having become pregnant after induced abortion, and 368 primigravid women of the same age. Spontaneous abortion appeared more frequently in the experimental group (5.9%) than in all control groups (5.1%, 3.3%, and 3.8% respectively. Preterm delivery was more frequent in the experimental group (9.3%) than in the control groups (6.8%, 6.4%, 5.7%, respectively). In the young adolescents (14-16 years old) of the experimental group, spontaneous abortion was almost twice as frequent (10.7%) as in the older adolescents of the same group (5.5%) and preterm delivery two and a half times as frequent (24.0%) as in the primigravid adolescents of the same age (10.3%). The weight of the newborns in the experimental group (3,155.7 +/- 536.3 g) was significantly lower than that in primigravid adolescents (3,228 +/- 488 g; t = 1.97, p less than 0.05), in women 20-24 years old with an earlier induced abortion (3,303 +/- 556 d; t = 3.49, p less than 0.01), and in primigravid women 20-24 years old (3.331 +/- 508; t = 4.30, p less than 0.001). The adolescents of the experimental group had on term deliveries in the 40th to the 42nd week significantly less frequently (31.6%) than primigravid adolescents (47.1%), 20-24 year-old women with earlier induced abortion (47.4%), and 20-24 year-old primigravid women (53.8%).