| Literature DB >> 1836712 |
R H Gray1.
Abstract
Determining sex of offspring by timing of intercourse has been a subject of intense interest for the lay public and professional community. This metaaanalysis 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.Keywords: Americas; Behavior; Demographic Factors; Developed Countries; Examinations And Diagnoses; Family Planning; Family Planning, Behavioral Methods; Fertile Period; Laboratory Examinations And Diagnoses; Laboratory Procedures; Natural Family Planning; North America; Northern America; Ovulation Detection; Population; Population Characteristics; Population Dynamics; Psychological Factors; Reproduction; Reproductive Technologies; Research Report; Sex Distribution; Sex Factors; Sex Preference; Sex Preselection; Sex Ratio; Sympto-thermal Method; Time Factors; United States; Value Orientation
Mesh：
Year: 1991 PMID： 1836712 DOI： 10.1016/s0002-9378(11)90558-4
Source DB: PubMed Journal: Am J Obstet Gynecol ISSN： 0002-9378 Impact factor: 8.661