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Chromosomal abnormality rates at amniocentesis and in live-born infants

E B Hook·1983·JAMA

Abstract

Regression-smoothed maternal age-specific rates of six different categories of cytogenetic abnormalities in recent large-scale prenatal cytogenetic studies were multiplied by independently derived fetal selection coefficients—factors that adjust for the excess likelihood of spontaneous loss of cytogenetically abnormal fetuses—to obtain estimated maternal age-specific rates of these categories of cytogenetic abnormalities in live-born infants. The derived rates apply to women whose only risk factor is advanced maternal age. The categories analyzed were 47,+21 (Down's syndrome), 47,+18 (Edwards' syndrome), 47,+13 (Patau's syndrome), 47,XXY (Klinefelter's syndrome), 47,XXX, and the group of other clinically significant abnormalities considered collectively. The rate of all clinically significant abnormalities considered together derived in this study was about five per 1,000 at age 35 years, 15 per 1,000 at age 40 years, and 50 per 1,000 at age 45 years. (JAMA1983;249:2034-2038)

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Metadata

Authors
Hook, E. B.
Venue
JAMA
Publisher
American Medical Association
Published
1983-04-15
Volume
249
Issue
15
Pages
2034-2038
ISSN
0002-9955 (ISSN-L)
OpenAlex
W4256487141
Cited by
289
References
0
FWCI
3.71
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Chromosomal abnormality rates at amniocentesis and in live-born infants. https://app.cochat.ai/papers/10.1001/jama.249.15.2034
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Hook, E. B. (1983). Chromosomal abnormality rates at amniocentesis and in live-born infants. JAMA. https://doi.org/10.1001/jama.249.15.2034

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