共 118 条
[21]
CRANE JP, 1991, OBSTET GYNECOL, V77, P533
[22]
ULTRASOUND FETAL FEMUR LENGTH MEASUREMENT IN THE SCREENING FOR DOWNS-SYNDROME
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1989, 96 (12)
:1373-1378
[23]
CUCKLE HS, 1984, LANCET, V1, P926
[25]
DEVORE G, 2006, ULTRASOUND OBST GYN, V58, P416
[30]
DeVore GR, 2001, PRENATAL DIAG, V21, P40, DOI 10.1002/1097-0223(200101)21:1<40::AID-PD980>3.0.CO