References:

1. Berg G, Hammar M, Moller-Nielsen J, Linden U, Throbald JL: Low back pain during pregnancy. Obstetrics and Gynecology 71 (1): 71-5, 1988.

2. Gariola DM, Tarver RD, Gibson L. Togers RE, Wase JL: Anatomic changes in the pelvis after uncomplicated vaginal delivery: a CT study on 14 women. American Journal of Roentgenology 153 (6): 1239-41, 1989.

3. Daly JM, Frames PS, Rapoze PA: Sacroiliac subluxation: a common, treatable cause of low-back pain in pregnancy. Family Practice Research Journal 11(2): 149-51,1991.