Sex ratio imbalance and Down's syndrome newborns.
Bianca
S
S
Bianca
M
M
Ettore
G
G
D004314:Down Syndrome / Q000453:epidemiology* / Q000235:genetics; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D012744:Sex Ratio