Embryological Studies on the Sex Chromatin in Man

Abstract

Abstract.In an investigation of the incidence of the sex chromatin of intermitotic nuclei in the various tissues (skin, stomach and muscle) of 37 human embryos (crown-rump length 7.9-318mm) and the ventral abdominal skin of 20 patients (10-80 years old), the following results were established. 1. In the early stages of 7.9-35.6mm crown-rump length (4-9 weeks), the sex can not be determined from the form of external genitals, without error, but it is