共 22 条
[1]
Abu-Heija A T, 1999, J Obstet Gynaecol Res, V25, P193
[2]
*ACOG COMM OP, 2002, OBSTET GYNECOL, V77, P77
[3]
CLARK SL, 1985, OBSTET GYNECOL, V66, P89
[4]
Demissie K, 1999, AM J EPIDEMIOL, V149, P824
[5]
FINBERG HJ, 1992, J ULTRAS MED, V11, P333
[10]
Lachman Eylon, 2000, Harefuah, V138, P628