共 198 条
[21]
Edmonds D.K., Lindsay K.S., Miller J.F., Et al., Early embryonic mortality in women, Fértil Steril, 38, (1982)
[22]
Wilcox A.J., Weinberg C.R., O#x0027
[23]
Connor J.F., Et al., Incidence of early loss of pregnancy, N Engl J Med, 319, (1988)
[24]
Speroff L., Glass R.H., Rase N.G., Clinical gynecologic endocrinology and infertility, (1989)
[25]
Byrne J., Warburton D., Kline J., Et al., Morphology ol early létal deaths and their chromosomal characteristics, Teratology, 32, pp. 297-315, (1985)
[26]
Szultnan A.E., Examination of the earlv conceptus, Arch Pathol (.ab Med, 115, pp. 696-700, (1991)
[27]
Cacciatore B., Intinen A., Stenman U.H., YIstalo P., Normal early pregnancy: scrum HCG levels and vaginal ultrasonography Undings, Br J Obstet Gynaecol, 97, pp. 899-903, (1990)
[28]
Goldstein I., mmer EA J., lamir A., Et al., Evaluation ol normal gestational sac growth: appearance of embryonic heartbeat and embryo body movements using the transvaginal technique, Obstet Gynecol, 77, (1991)
[29]
Yeh H.C., RabinowitzJG, 166, pp. 97-103, (1988)
[30]
Goldstein R.B., Endovaginal sonography in very early preg- nancy: new observations, Radiology, 176, pp. 7-8, (1990)