References
- Cagnacci A, Renzi A, Arangino S, Alessandrini C, Volpe A. Influences of maternal weight on the secondary sex ratio of human offspring. Hum Reprod. 2004; 19: 442–4
- Catalano R, Bruckner T, Hartig T, Ong M. Population stress and the Swedish sex ratio. Paediatr Perinat Epidemiol. 2005; 19: 413–20
- Obel C, Henriksen TB, Secher NJ, Eskenazi B, Hedegaard M. Psychological distress during early gestation and offspring sex ratio. Hum Reprod. 2007; 22: 3009–12
- Mathews F, Johnson P, Neil A. You are what your mother eats: evidence for maternal preconception diet influencing foetal sex in humans. Proc Biol Sci. 2008; 275: 1661–8
- Rosenfeld C, Roberts R. Maternal diet and other factors affecting offspring sex ratio: a review. Biol Reprod. 2004; 71: 1063–70
- Bulik CM, Von Holle A, Hamer R, Knoph Berg C, Torgersen L, Magnus P, et al. Patterns of remission, continuation and incidence of broadly defined eating disorders during early pregnancy in the Norwegian Mother and Child Cohort Study (MoBa). Psychol Med. 2007; 37: 1109–18
- Magnus P, Irgens L, Haug K, Nystad W, Skjaerven R, Stoltenberg C. Cohort profile: the Norwegian Mother and Child Cohort Study (MoBa). Int J Epidemiol. 2006; 35: 1146–50
- Irgens L, Bergsjø P, Lie R. The medical birth registry of Norway. Epidemiological research and surveillance throughout 30 years. Acta Obstet Gynecol Scand. 2000; 79: 435–9
- Reichborn-Kjennerud T, Bulik C, Tambs K, Harris J. Genetic and environmental influences on binge eating in the absence of compensatory behaviors: a population-based twin study. Int J Eat Disord. 2004; 36: 307–14
- American Psychiatric Association. Diagnostic and statistical manual for psychiatric disorders: fourth edition. Washington, DC: American Psychiatric Press, 1994.
- SAS Institute Inc. SAS/STAT® Software: Version 9. Cary, NC: SAS Institute Inc., 2004.
- Parazzini F, La Vecchia C, Levi F, Franceschi S. Trends in male: female ratio among newborn infants in 29 countries from five continents. Hum Reprod. 1998; 13: 1394–6
- Vatten L, Skjaerven R. Offspring sex and pregnancy outcome by length of gestation. Early Hum Devel. 2004; 76: 47–54
- Beratis N, Asimacopoulou A, Varvarigou A. Association of secondary sex ratio with smoking and parity. Fertil Steril. 2008; 89: 662–7
- Orvos H, Kozinszky Z, Bártfai G. Natural variation in the human sex ratio. Hum Reprod. 2001; 16: 803
- Jongbloet P. Over-ripeness ovupathy. A challenging hypothesis for sex ratio modulation. Human Reprod. 2004; 19: 269–774
- Crawford M, Doyle W, Meadows N. Gender differences at birth and differences in fetal growth. Hum Reprod. 1987; 2: 517–20