Whether you can exercise when you are pregnant should be analyzed on a case-by-case basis. For pregnant women with exercise habits, it is recommended to exercise appropriately in mid-pregnancy. For those who do not have exercise habits, it is not advocated to purposely strengthen the exercise workout, with appropriate exercise as the main focus. Pregnant women who have fitness habits before pregnancy, such as daily and weekly fitness program, and physical fitness is also very good, it is recommended that, in addition to the first trimester and the second trimester of pregnancy does not advocate fitness exercise, generally in the mid-pregnancy, advocate pregnant women to carry out moderate sports exercise. For pre-pregnancy no sports and exercise habits, or habitual abortion occurs pregnant women, it is recommended that the post-pregnancy do not do strenuous exercise exercise, only to walk, pregnant women yoga, slow walking, swimming and other sports. If the uterus is over-expanded in the late stages of pregnancy, the tension becomes greater and the load increases, the amount of exercise should be gradually reduced. In general, exercise does not play a decisive role in vaginal delivery, but the force of labor, the birth canal, and the position of the fetus play a decisive role in vaginal delivery, but pregnant women who are in good physical condition and used to exercising may have a smoother delivery.