6Menticoglou SM,Mannin f,Harman C,et al.Perinatal outcome in relation to second-stage duration[J].Am J Obstet Gynecol,1995,173:906-912.
7Moon JM,Smith CV,Rayburn WF.Perinatal outcome after a prolonged second stage of labor[J].J Reprod Med,1990,35:229-231.
8Kuo YC,Chen CP,Wang KG.Factors influencing the prolonged second stage and the effects on perinatal and maternal outsomes[J].J Obstet Gynaecol Res,1996,22:253-257.
9Gerber S,Vial Y,Hohlfeld P.Pronostic maternal et neonatal lors d'une deuxieme phase d'scouchement prolongee[J].J Gynecol Obstet Biol Reprod,1999,28:145-150.
10Saunders NG,Paterson CM,Wadsworth J.Neonatal and maternal morbidity in relation to the length of the second stage of labour[J].Br J Obstet Gynaecol,1992,99:381-385.
