共 14 条
[2]
ELTORKY M, 1986, J REPROD MED, V31, P283
[3]
FLEISCHER AC, 1996, SONOGRAPHY OBSTET GY, P729
[4]
FLEMING H, 1989, OBSTET GYNECOL, V73, P209
[6]
GHOSH TK, 1986, OBSTET GYNECOL, V68, pS40
[7]
Hoffman M K, 1997, Obstet Gynecol Surv, V52, P736, DOI 10.1097/00006254-199712000-00004