title: Genetic studies on hypospadias in males.
mesh_terms: D001345:Autoradiography; D001722:Birth Order; D001724:Birth Weight; D004200:Diseases in Twins; D004314:Down Syndrome; D005260:Female; D006801:Humans; D007021:Hypospadias / Q000453:epidemiology / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D008423:Maternal Age; D009030:Mosaicism; D012621:Seasons; D012729:Sex Chromosome Aberrations