The transition in frequency of Y chromatin in males during the neonatal period |
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| Authors: | Kumiko Iijima Makoto Higurashi Munehiro Hirayama |
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| Affiliation: | (1) Department of Maternal and Child Health, School of Health Sciences, Faculty of Medicine, University of Tokyo, Japan |
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| Abstract: | Summary The frequency of Y chromatin, visualized as fluorescent bodies in cell nuclei from lymphocytes in blood smears, was signficantly less in newborn males than in three-month-old male infants and adults. The frequency of Y chromatin-positive cells on day 0 was 36.16±9.11% and then increased daily. At one month after birth the frequency was 55.07±9.29%, which was not significantly different from that in adult males (57.08±5.97%). |
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