1. Exercise during pregnancy and the postpartum period, Committee Opinion No. 267;American College of Obstetricians and Gynecologists Committee on Obstetric Practice;Obstet Gynecol,2002
2. Exercise during pregnancy. A clinical update;Clapp;Clin Sports Med,2000
3. Recent studies in the epidemiologic assessment of physical activity, fetal growth, and preterm delivery: A narrative review;De Ver Dye;Clin Obstet Gynecol,2003
4. Aerobic exercise for women during pregnancy. Cochrane Pregnancy and Childbirth Group;Kramer;Cochrane Database Syst Rev 3,2006
5. Interventions for preventing and treating pelvic and back pain in pregnancy. Cochrane Pregnancy and Childbirth Group;Young;Cochrane Database Syst Rev 3,2003