共 5 条
[2]
Risk of twinning as a function of maternal height and body mass index
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
2004, 291 (13)
:1564-1566
[4]
SECULAR CHANGES IN THE TWINNING RATE IN DENMARK 1931 TO 1977
[J].
SCANDINAVIAN JOURNAL OF SOCIAL MEDICINE,
1980, 8 (03)
:89-94
[5]
Population based study of rates of multiple pregnancies in Denmark, 1980-94
[J].
BMJ-BRITISH MEDICAL JOURNAL,
1997, 314 (7083)
:775-779