Abdominal distension as the first echographic sign of hydrometrocolpos in a female fetus.

We report a 31 weeks gestation female fetus with marked abdominal distension on echography as the first sign of hydrometrocolpos. Postmortem examination revealed a massive plastic peritonitis due to the spillage of genital secretions into the peritoneal cavity with secondary lung hypoplasia and obstructive renal dysplasia type IV.