If you never exercised prior to becoming pregnant, but have decided that now is the time to start, the risks of exercise be more of a risk than your low level of exercise.

Most women build up their strength, stamina and overall fitness over a period of time. Their body's undergo changes during this time, and most doctors feel that pregnancy changes on your body are enough when you are not an active person.

Of course, all is not lost. You can do easy and gentle exercise, just skip the muscle building and karate classes until after the birth.

As with all lifestyle changes you make during your pregnancy, it is recommended that you consult with your physician before beginning. Because each pregnancy is different, she can offer advice on what you should and shouldn't do. She will take into consideration your weight, fitness level, and any pregnancy complications or conditions before making a decision.

Only your physician can make this decision, which is why it is very important to consult your doctor prior to starting any new exercise or fitness program.

Also read Best exercises during pregnancy