[A further chromosome analysis in induced abortions (author's transl)].

The cytogenetic data of 500 unpublished cases of induced abortions are reported. The incidence of gross chromosome abnormalities was 7.4% (37/500). The frequencies of chromosome abnormalities after 6 gestational weeks decreased gradually with advancing the gestational weeks, while the frequency in the group of 5 gestational weeks remained considerably high as 25.0%.