Abruptio placentae and fetal sex ratio.

In the authors' department, 175 cases of abruption of the placenta - 0.65% of all births at the department - were treated in the course of 15 years. The sex ratio of fetuses in association with this complication was 131.08; higher than those of all neonates during the same period of time. The material was further analysed by maternal age, parity and neonatal birth weight.