5O'leary JA.Shoulder dystocia:prevention and treatment[J].Am J Obstet,1990,162:5.
6Riska A,Laine H,Voutilainen P.Estimation of fetal shoulder width by measurement of the hunerospinors distance by ultrasound[J].Ultrasound Obstet Gynecol,1996,7(4):272.
7Cohen B,Penning S,Major C,et al.Sonographic prediction of shoulder dystocia in infants of diabetic mothers[J].Obstet Gyencol,1996,88:10.
6O'leary JA,Leonetti HB.Shoulder dystocia:prevention and treatment.Am J Obstet Gynecol,1990,162(1):5
7Riska A,Laine H,Voutilainen P.Estimation of fetal shoulder width by measurement of the humerospinors distance by ultrasound.Ultrasound Obstet Gynecol,1996,7(4):272
8Cohen B,Penning S,Major C,et al.Sonographic prediction of shoulder dystocia in infants of diabetic mothers.Obstet Gynecol,1996,88(1):10
2Riska A, Laine H, Voutilaine P. Estimation of' fetal shoulder width bymea- surement of the hunerospinors distance by ultra sound. Uhrasound Obstet Gynecol, 2006,7 : 272.
