Natural family planning and sex selection: fact or fiction?
作者： Ronald H. Gray
DOI: 10.1016/S0002-9378(11)90558-4
关键词:
摘要: Determining sex of offspring by timing intercourse has been a subject intense interest for the lay public and professional community. This metaanalysis couples practicing natural family planning provides an opportunity to evaluate ratios in relation conception with several parameters, including basal body temperature shift peak mucus as markers ovulation. Data from six studies show statistically significant lower proportion male births among conceptions that occur during most fertile time cycle.
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