We start looking for gender at 15 weeks. As skilled and experienced OB sonographers we will do our best to determine your baby’s gender. We know that finding out the sex of your baby is very important so if we can’t see it for any reason, you may return again at no additional cost. There are some factors that can affect visualizing gender, including baby’s development, mother’s body size, baby’s position and mother’s water intake. If you have any questions about our 3D and 4D ultrasound process in Chicago, contact us!