A review of the established and suspected causes of variations in human sex ratio at birth

• Published in: Early human development Vol. 109; pp. 50 - 56
• Main Authors: James, William H, Grech, Victor
• Format: Journal Article
• Language: English
• Published: Ireland Elsevier B.V 01.06.2017
• Subjects: Advanced Basic Science; Birth Order; Female; Fetal Mortality; Gonadal Hormones - blood; Humans; Infant, Newborn; Male; Neonatal and Perinatal Medicine; Sex Ratio; Stress, Psychological - epidemiology

Abstract The human sex ratio (proportion male) at birth (SRB) varies with many variables. Some of this variation has an established proximate cause. For instance, low SRB (more females) at birth are associated with various forms of stressful events or circumstances during or prior to pregnancy. Thes...