<prompt> Fetal sex can be detected by USG at20 weeks16 weeks18 weeks14 weeks  <response>: Male development is completed by 12 weeks and female development by 15 weeksBy 28 weeks,the testis descends to the internal inguinal ring.By 36 weeks, one testis and by 38-40 weeks both testes descend into scrotumIn female, the genital tubercle becones clitoris, the genital folds become the labia minora and the genital swellings became the labia majora 