Neonatal sex ratio in pregnancies of adolescent mothers.

Abstract

The authors have reviewed the sex ratio in 353 offspring of adolescent parturients based on a 5-year material of their department. The 174 males and 179 females provided a sex ratio of 97.2; less than the usual ratio of 106. Interestingly, females are prevalent not only among low-birth-weight but also among average-birth-weight babies of adolescents. The hypothesis is presented that the anatomy of the cervix and the chemical composition of the cervical mucus may affect the sex ratio in some manner.