title: Different sex ratios at birth in Europe and North America. Maternal cytomegalovirus seropositivity affects sex determination.
authors.forename: M D
authors.initials: MD
authors.lastname: Shields
authors.forename: Bernadette
authors.initials: B
authors.lastname: O'Hare
authors.forename: J
authors.initials: J
authors.lastname: Nelson
authors.forename: M C
authors.initials: MC
authors.lastname: Stewart
authors.forename: P
authors.initials: P
authors.lastname: Coyle
mesh_terms: D003586:Cytomegalovirus Infections / Q000453:epidemiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology / Q000821:virology*; D012744:Sex Ratio