Secular changes of twinning rates in Nordic populations.
Eriksson
A W
AW
Institute of Genetics, Population Genetics Unit, Helsingfors, Finland.
Abbott
C
C
Kostense
P J
PJ
Fellman
J O
JO
D000328:Adult; D001723:Birth Rate; D003710:Demography; D005260:Female; D005387:Finland; D006801:Humans; D008297:Male; D017533:Marital Status; D008423:Maternal Age; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy; D012537:Scandinavian and Nordic Countries; D014427:Twins