Timing methods Sex selection






^ wilcox, allen j.; weinberg, clarice r.; baird, donna d. (1995). timing of sexual intercourse in relation ovulation — effects on probability of conception, survival of pregnancy, , sex of baby . new england journal of medicine. 333 (23): 1517–21. doi:10.1056/nejm199512073332301. pmid 7477165. 
^ harlap, susan (1979). gender of infants conceived on different days of menstrual cycle . new england journal of medicine. 300 (26): 1445–8. doi:10.1056/nejm197906283002601. pmid 449885. 
^ mcsweeney, léonie (march 2011). successful sex pre-selection using natural family planning . african journal of reproductive health. 15 (1): 79–84. pmid 21987941. 
^ gray, rh (1991). natural family planning , sex selection: fact or fiction? . american journal of obstetrics , gynecology. 165 (6 pt 2): 1982–4. doi:10.1016/s0002-9378(11)90558-4. pmid 1836712. 
^ shettles, l.; d.m. rorvick (2006). how compare? . in martin j. whittle , c. h. rodeck. how choose sex of baby: method best supported scientific evidence. new york: random house. p. [1]. isbn 978-0-7679-2610-2. 






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