Interplay between maternal weight and seasons in determining the secondary sex ratio of human offspring

被引：15

作者：

Cagnacci, A

Renzi, A

Arangino, S

Alessandrini, C

Volpe, A

机构：

[1] Policlin Modena, Gynecol Unit, Dept Obstet Gynaecol & Pediat, Modena, Italy

[2] ASL Modena, Gynecol Unit, Modena, Italy

来源：

FERTILITY AND STERILITY | 2005年 / 84卷 / 01期

关键词：

D O I：

10.1016/j.fertnstert.2004.12.054

中图分类号：

R71 [妇产科学];

学科分类号：

100211 ;

摘要：

When gender of 9,284 single fetuses, which were delivered at term in the Policlinic of Modena between 1997-2001, was stratified for month of conception and for quartiles of pregravid maternal weight, it showed that the ratio of male to female fetuses (secondary sex ratio) was characterized by a clear seasonal variation that was modulated by pregravid maternal weight. Two seasonal peaks of sex ratio (March and October +/- 31 days) were observed in mothers in the lowest two quartiles of prepregnancy body weight (: 62 kg), and one single peak (October +/- 36 days) was observed in mothers with preconception weight in the upper two quartiles. (c) 2005 by American Society for Reproductive Medicine.

引用

页码：246 / 248

页数：3

共 19 条

[11] Influence of parental and biological factors on the male birth fraction in the United States: an analysis of birth certificate data from 1964 through 1988 [J].