Many mothers like coming in at least twice (and often more!), early on, 14-25 weeks, when they can see the baby as a whole, and then again at 25-34 weeks to see a more detailed face. Between 28 and 32 weeks, your baby develops more fat and gets a more defined face. After 34 weeks, it becomes more and more difficult to obtain good pictures since the baby is running out of room. However all babies are different and we have been successful in obtaining great images all the way up to 36 weeks.