Sex chromatin frequency in elderly women after the menopause.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002467:Cell Nucleus / Q000032:analysis; D002610:Cheek / Q000166:cytology; D004847:Epithelial Cells; D005260:Female; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D012728:Sex Chromatin / Q000032:analysis*