Swimming is the best form of exercise during pregnancy. You do not need to worry about the water buoyancy as it does not exert pressure on the tummy. It strengthens the pelvic muscles, arms and back, which relieves you from aches and pains. Avoid Backstroke in your late pregnancy as the baby may cause pressure on the main blood vessels in the abdomen. If you experience lower abdominal pain, uterine contraction, bleeding you should immediately get out of the swimming pool and contact your doctor.
If you have a history of recurrent miscarriage, ruptured membranes, early labour, a weak cervix, or heart and lung disease you may want to take advice from your doctor before starting a swimming programme.
Please be careful about the slippery area around the swimming pool.