共 43 条
[1]
ARIAS F, 1988, OBSTET GYNECOL, V71, P545
[4]
SIGNIFICANCE OF THE ULTRASOUND LOCATION OF PLACENTAL SITE IN EARLY-PREGNANCY
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1979, 86 (11)
:846-848
[5]
CHERVENAK FA, 1984, OBSTET GYNECOL, V64, P798
[6]
CLARK SL, 1985, OBSTET GYNECOL, V66, P89
[7]
COMEAU J, 1983, OBSTET GYNECOL, V61, P577
[9]
Crenshaw C Jr, 1973, Obstet Gynecol Surv, V28, P461, DOI 10.1097/00006254-197307000-00001