Different sex ratios at birth in Europe and North America. Maternal cytomegalovirus seropositivity affects sex determination.
Shields
M D
MD
O'Hare
Bernadette
B
Nelson
J
J
Stewart
M C
MC
Coyle
P
P
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