共 3 条
[1]
The presence of cervical and vaginal fetal fibronectin predicts preterm delivery in an inner-city obstetric population. Lockwood GJ,Wein R,Lapinsk R,et al. American Journal of Obstetrics and Gynecology . 1993
[2]
The epidemiology of preterm birth. Denise M,Main MD. Clinical Obstetrics and Gynecology . 1998
[3]
Factors associated with preterm birth in Cardiff, Wales Ⅱ.Indicated and spontaneous preterm birth. Meis PT,Michielutte R,Peters TJ,et al. American Journal of Obstetrics and Gynecology . 1994