정상임신 및 비임신부에서의 성염색질 출현 빈도에 관한 연구에서 비임신부와 임신부간에는 통계적으로 유의한 차를 확인할 수 없었다.

Sex chromatin mass in the interphase nuclie of somatic cells has proven to be a diagnostic value as an indication of the number of X chromosomes. Recently several investigators reported changes in sex chromatin frequency of mucosal cells throughout the pregnancy and the menstrual cycle. To observe any significant change in the frequency of sex chromatin positive cells with relation to menstrual cycle and pregnancy, 141 pregnant and 176 non-pregnant women have been subjected for the sex chromatin count using carbolfuchsin staining of the oral mucosal cells. Results: 1. The mean sex chromatin frequency was 32.6 per cent in women with normal menstrual cycles. 2. No significant changes in the sex chromatin frequency has been observed in relation to the menstual cycle. 3. The mean sex chromatin frequency was 33.7 per cent in pregnant women. 4. Statistical analysis revealed no significant differnce in the mean sex chromatin frequency among each trimester groups. 5. No significant difference has been observed in the mean sex chromatin frequency between pregnant and non-pregnant condition.