It is recommended to have at least two ultrasound tests during pregnancy but could require more for high-risk pregnancies or if your doctor identifies certain risk factors. rn Your first ultrasound, or u201Cdating ultrasoundu201D, helps doctors confirm your due date. The second ultrasound, or u201Canatomy ultrasoundu201D, is done between 18-20 weeks of gestation to evaluate fetal anatomy and see if all parts of the baby are formed well. Additionally, this ultrasound can also determine your babyu2019s gender! Schedule an appointment with Gwinnett in Snellville, GA, for your first ultrasound!