An ob-gyn or OB is an obstetrician, a medical doctor who has special training and education in women’s health. A midwife (or certified nurse midwife), on the other hand, is a trained healthcare professional who cares for a mom-to-be throughout pregnancy as well as during labor and delivery. Both experts can deliver babies during uncomplicated vaginal births, but a midwife is not a medical doctor. As a result, choosing an OB is often ideal for those with high-risk pregnancies, including women who are 35 and older, or have existing conditions, like diabetes or hypertension.