Parental age gap and child sex ratio--fact or fiction?
Hakko
H
H
Räsänen
P
P
Järvelin
M R
MR
Tiihonen
J
J
D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D010290:Parents; D012744:Sex Ratio