Women who are obese have high risk pregnancies. The best way to avoid those risk is to achieve a normal body weight prior to becoming pregnant. Either by a change in your lifestyle and diet or even with weight loss programs including bariatric surgery. If you can achieve a normal body weight prior to becoming pregnant, you're more likely to avoid complications related to infertility. You're also more likely to avoid the complications that can occur during pregnancy, during labor and delivery and also complications for your newborn.