Different sex ratios at birth in Europe and North America. Latitude has important role.
Voracek
Martin
M
Fisher
Maryanne L
ML
D005060:Europe; D005260:Female; D005843:Geography; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009656:North America; D017440:Photoperiod; D012744:Sex Ratio