[Sex chromatin and cytohormone smear in premature and dystrophic newborn during the first week of life].

In newborn females parallel investigations on: a) oestrogenisation symptoms, b) vaginal epithelium smears stained modo Shorr, c) sex chromatin positive nuclei in buccal epithelium smears, have been performed. Low frequency of sex chromatin in the day after birth suggested a relationship between hormone level and Barr bodies' appearance.