“This preconception visit can also encourage women to maintain a healthy weight and lifestyle. I counsel all of my patients that they will gain weight in pregnancy, and so they should start the pregnancy at a healthy weight. I encourage regular exercise even prior to becoming pregnant, and then continuing that level of activity during pregnancy. Being at a healthy weight prior to conceiving and maintaining a healthy weight throughout pregnancy can help decrease your risk of developing diabetes or elevated blood pressure during pregnancy. Having a body mass index (BMI) of 30 or above can also increase your risk of birth defects, which is why maintaining a healthy weight is also important.”

Harvard Health Publishing (https://www.health.harvard.edu/blog/what-can-you-do-to-reduce-the-risk-of-birth-defects-2020012218703)