Every woman is different, and every pregnancy is different. Some women experience no signs of pregnancy, where others may feel many signs including breast tenderness, nausea, frequent urination and fatigue. On the advice of your physician, you can continue an existing exercise program. Walking is very beneficial exercise for pregnancy and has been shown to decrease the length of labor and increase the health of the baby.
Labor is an aerobic event.
Exercise will help you prepare for it. The pressure of the baby on the bladder during pregnancy will cause you to urinate more often. In almost all cases, morning sickness or nausea will resolve by the 13th week. Some women experience heartburn during various times of the pregnancy. This may be relieved by eating smaller frequent meals.