For the safest workout, start with exercises geared toward pregnant women, and keep in mind some safety tips.

As with any pregnancy exercise, talk to your doctor before you begin Pilates or continue with it if you are pregnant or planning to become pregnant. If you are a beginner, start with an entry-level class or video, and make sure your instructor knows you are pregnant so she can offer exercise modifications. If you are using a video, try one that states it is appropriate for pregnancy. A few physiological notes about your body during pregnancy, and considerations that they require: lying on your back can cut off the oxygen supply to the baby, especially as the baby grows and takes up more space in your abdomen. Therefore, avoid moves performed in the supine position during your second and third trimesters. Also, your ligaments will loosen during pregnancy, so keep your movements controlled and move within a comfortable range of motion. Finally, do not hold your breath, and never do any exercise that causes dizziness, nausea, shortness of breath, or pain.