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过去10年中,报导过一些北美和欧洲新生儿染色体的观察结果。有些报告由于经费限制而使检查例数较少。除了Down氏综合征以外,在日本未对新生儿进行染色体异常的研究。为了查明日本新生儿染色体异常的频率,最近做了大量的调查。本报告记录了一个医院中连续出生的12,319例活产新生儿的观察结果。对694例怀疑是常染色体畸变的婴儿进行了染色体的研究。首先检查了2,054例女婴和3,311例男婴的染色质,进而分析52例性染色质异常婴儿的染色体。
Over the past 10 years, some observations of neonatal chromosomes in North America and Europe have been reported. Some reports have fewer exams due to funding constraints. In addition to Down’s syndrome, no studies have been done on neonatal chromosomal abnormalities in Japan. In order to find out the frequency of neonatal chromosomal abnormalities in Japan, a large number of surveys have recently been conducted. This report documents the observation of 12,319 live births born in a row in a hospital. Chromosome studies were performed on 694 infants suspected of being autosomally aberrated. First, the chromatin of 2,054 female babies and 3,311 male babies was checked, and then the chromosomes of 52 cases of abnormal sex chromosomes were analyzed.