共 22 条
[12]
Mason Tina C, 2005, J Natl Med Assoc, V97, P826
[15]
PRICHARD JG, 1986, OBSTET GYNECOL, V68, pS46
[16]
RUCH WA, 1963, OBSTET GYNECOL, V21, P593
[17]
Sah Shatrughan Prasad, 2005, Southeast Asian Journal of Tropical Medicine and Public Health, V36, P979
[18]
Tobias DH, 1996, J REPROD MED, V41, P375
[19]
WEISS G, 1976, NEW YORK STATE J MED, V76, P572
[20]
Wong T C, 1986, J Ark Med Soc, V83, P138