共 2 条
[1]
CUCKLE HS, 1990, PRENATAL DIAGNOSIS P, P67
[2]
SELECTIVE MISCARRIAGE OF DOWNS-SYNDROME FETUSES IN WOMEN AGED 35 YEARS AND OLDER
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1995, 102 (10)
:798-801