Male to female ratio in newborns of grand grand multiparous women

The male to female ratio in newborns of grand grand multiparous women was evaluated in 569 Jewish Orthodox women and 28 Muslim women. A total of 882 babies was born on the > or = 10th delivery; 460 (52.2%) were males and 422 (47.8%) were females (sex ratio = 1.06). Newborn sex ratio did not signi...

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Veröffentlicht in:	Human reproduction (Oxford) 1998-08, Vol.13 (8), p.2323-2324
Hauptverfasser:	Almagor, M, Schwed, P, Yaffe, H
Format:	Artikel
Sprache:	eng
Schlagworte:	Adult Biological and medical sciences Birth Order Female Fundamental and applied biological sciences. Psychology Humans Infant, Newborn Islam Israel Jews Male Mammalian reproduction. General aspects Maternal Age Middle Aged Parity Pregnancy Pregnancy, High-Risk Sex Ratio Vertebrates: reproduction
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Zusammenfassung:	The male to female ratio in newborns of grand grand multiparous women was evaluated in 569 Jewish Orthodox women and 28 Muslim women. A total of 882 babies was born on the > or = 10th delivery; 460 (52.2%) were males and 422 (47.8%) were females (sex ratio = 1.06). Newborn sex ratio did not significantly change with respect to birth order or maternal age. It is suggested that parity and increasing maternal age do not affect the sex ratio of newborns and that ethnic and environmental variables may play a role in the deviations in offspring sex ratio observed among different populations.
ISSN:	0268-1161 1460-2350
DOI:	10.1093/humrep/13.8.2323