[Hydrometrocolpos causing progressive unilateral hydronephrosis in agenesis of the contralateral kidney]

The number of detected fetal abnormalities in our prenatal diagnostic division illustrate the high frequency of fetal urogenitaly malformations. Moreover, we report on a case of hydrometrocolpos caused by sinus urogenitalis which effects a progressive unilateral hydronephrosis by agenesia of the contralateral kidney. The progressive hydronephrosis in conclusion leads to a preterm induction of labor in fetoprotective intension.