NATURAL FAMILY-PLANNING AND SEX SELECTION - FACT OR FICTION

被引：42
|
作者：
GRAY, RH
机构：
[1] Department of Population Dynamics, School of Hygiene and Public Health, Johns Hopkins University, Baltimore, Maryland
来源：
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY | 1991年 / 165卷 / 06期
关键词：
NATURAL FAMILY PLANNING; SEX SELECTION; Y-BEARING SPERM; X-BEARING SPERM;
D O I：
10.1016/S0002-9378(11)90558-4
中图分类号：
R71 [妇产科学];
学科分类号：
100211 ;
摘要：
Determining sex of offspring by timing of intercourse has been a subject of intense interest for the lay public and professional community. This metaanalysis of couples practicing natural family planning provides an opportunity to evaluate sex ratios in relation to the timing of conception with several parameters, including basal body temperature shift and peak mucus as markers of ovulation. Data from six studies show a statistically significant lower proportion of male births among conceptions that occur during the most fertile time of the cycle.
引用
收藏
页码：1982 / 1984
页数：3
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