Risk of spontaneous abortion following legally induced abortion.

Abstract:

:Using the registration of all pregnant women living within a particular geographical district of Copenhagen the risk of spontaneous abortion has been calculated by means of a decremental method. A total of 3,042 pregnancies were registered and the total risk of spontaneous abortion was calculated at 10 per cent. In 431 women the previous pregnancy had been terminated by a legally induced abortion. Increased risk of spontaneous abortion could not be demonstrated in this group, where the cumulative risk of spontaneous abortion was 12 per cent. In particular, the risk of late abortion was not seen to increase. :A prospective study was conducted in Copenhagen to determine if there is an increased risk of spontaneous abortion in women whose previous pregnancy was terminated by legal abortion. During the study period 3042 pregnancies were registered and included 1667 deliveries, 210 spontaneous abortions, 17 extrauterine pregnancies, and ll48 legal abortions. 4 categories (Groups 1, 2, 3, 4) were described according to termination of previous pregnancy. The women were also grouped according to age. The decremental method was used in calculating risk of spontaneous abortion. A generalized edition of Wilcoxons' test was used in comparing risk of spontaneous abortion in each group, with 0.05 regarded as the significance level. The results showed a cumulative risk of spontaneous abortion of 10.0%; the risk was greatest in women over 30 years of age (15.9%). In women of the age-group 21-30 years, the risk was 8.2%. The risk of spontaneous abortion was not increased in 431 women whose previous pregnancy was terminated by a legal abortion; cumulative risk of spontaneous abortion was 12.0%. In this group, no spontaneous abortions after 18 weeks of gestation were observed.

authors

Obel EB

doi

10.3109/00016348009154629

subject

Has Abstract

pub_date

1980-01-01 00:00:00

pages

131-5

issue

2

eissn

0001-6349

issn

1600-0412

journal_volume

59

pub_type

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