A: Peek A Baby offers different packages. The amount of weeks pregnant you are depends on how you can view your baby. The earliest we recommend to determine the sex of your baby is 17 weeks. 3D/4D may be done from 17 to 24 weeks; however, the baby will have a more skeletal appearance. During this time, you are able to view more of your baby on the monitor and witness the amazing development already underway because the baby is smaller at that time. When you become 22 weeks, your baby starts developing a fat layer that fills in their features, so you will see more facial detail at that time. Many soon-to-be parents choose to come in twice or more to see their baby at various stages. Peek A Baby believes the best time to visit us is 17-34 weeks into your pregnancy. We do see women up to full term, but with variable results. More fat does create pudgy images, but the baby gets increasingly crowded and may hide. An ultrasound image depends upon the baby's position, size, placenta positioning, and maternal tissue, so we cannot guarantee images quality due to those factors that are beyond our control.