A survey of X chromatin in the newborn.

Autor: Petersen KW, Jacobson CB, Telford IR, Del Var Petersen H
Jazyk: angličtina
Zdroj: Biology of the neonate [Biol Neonate] 1976; Vol. 29 (5-6), pp. 267-73.
DOI: 10.1159/000240874
Abstrakt: Buccal smears were analyzed for X chromatin in 1,000 newborn infants. The mean percentage of X chromatin in the 506 female infants was 39.5 (range 19-61) and in the 494 males 0.13 (range 0-3.0). Evaluation of the data comparing the percentage of X chromatin with caucasian and noncaucasian infants, the weight of the newborn, and the gestation time, indicated no significant differences within the male or female populations. A longitudinal study on 25 female infants for the first 4 days postpartum indicated a significant increase in the percentage of X chromatin in females.
Databáze: MEDLINE