Methods A total of 81 women with spontaneous preterm labor(sPTL) and 51 with cervical incompetence(CI) before their 34th gestational weeks were enrolled in this study from January 2003 to March 2006.

Prognostic value of fetus Fibronectin and length of cervix uteri detected by vagina sonography for premature delivery;

Role of infection in development of premature delivery;

Therapeutic efficacy of dexamethasone in antenatal therapy in premature delivery gravidas;

Study on the significance of fetal fibronectin in the prediction and early diagnosis for premature labor;

Clinical observation of oxyephedrine(Anbo) on management of threatened premature labor;

Study of the relationship between serum ferritin and PROM and premature labor;

Changes of maternal serum cortisol and corticosteroid binding globulin levels in idiopathic preterm labor;

Cellular proliferation and apoptosis in placental trophoblast of preterm labor;

Relation of expressions of matrix metalloproteinase (MMP)-9 in human placenta and to preterm labor;

Efficacy of intravenous or atomizing ambroxol for prevention of respiratory distress syndrome in preterm infants;

Analysis of the concentration of plasma copper and collagen in fetal membrane of the preterm s mothers;

Brainstem auditory evoked potentials at different of click stimuli rates in preterm infants;