7Waddle G.Low back pain:a twentieth century health care enigma[J].Spine,1996,21 (24):2820-2825.
8Stuge B,Laerum E,Kirkesola G,et al.The efficacy of a treatment program focusing on specific stabilizing exercises for pelvic girdle pain after pregnancy:a randomized controlled trial[J].Spine,2004,29(4):351 -359.
9Kitamura T, Shima S, Sugawara M, et al. Psychological and social correlates of the onset of affective disorders among pregnant women[J ].Psvchological Medicine, 1993, 23 (3): 967 - 975.
10Fridh G, Kopare T, Gaston-Johansson L, et al. Factors associated with more intense labor pain[J]. Research in Nursing and Health, 1988,11(4):117- 124.