共 16 条
[1]
BRACERO L, 1986, OBSTET GYNECOL, P68
[2]
BRAR HS, 1988, J REPROD MED, V33, P741
[4]
CAMPBELL S, 1986, OBSTET GYNECOL, V68, P649
[5]
CAMPBELL S, 1983, LANCET, V1, P875
[6]
ERSKINE RLA, 1985, BRIT J OBSTET GYNAEC, V92, P605
[8]
Hatle L, 1985, DOPPLER ULTRASOUND C, V2nd