Background: Exercise has been shown to be safe for mother and fetus with many benefits for women with uncomplicated pregnancies. Purpose: There are two parts to introduce the exercise prescription for pregnant women: (1) Safety considerations during pregnancy: pre-exercise and ongoing risk assessment, appropriate hydration and energy, avoid hyperthermia, avoid hypoglycemia, prevent falling or over extension or over flexion (2) Exercise prescription for pregnancy women: aerobic exercise and strength training, performed for 30 minutes daily for five to seven days per week or 150 minutes per week, moderate intensity and increasing gradually. Moreover, this paper descriptive special population of elite/competitive athletes exercises prescription. This article will provide the guidance for prescribing or counseling exercise for women during pregnancy.