SECULAR TRENDS OF TWINNING RATE IN SWEDEN

被引:8
|
作者
HOGBERG, U [1 ]
WALL, S [1 ]
机构
[1] UMEA UNIV, DEPT EPIDEMIOL & HLTH CARE RES, S-90187 UMEA, SWEDEN
关键词
D O I
10.1017/S0021932000020046
中图分类号
C921 [人口统计学];
学科分类号
摘要
The change in parity and maternal age in Sweden accounts for the decline in the twinning rate from the 19th century to the middle of the 20th century. The later decline in twinning rate cannot be explained by changes in maternal age and parity. Fecundity appears to be higher in mothers of twins than in other mothers.
引用
收藏
页码:487 / 496
页数:10
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