At 16-20 wks you are still able to see the baby’s complete body, baby is very tiny, just skin on bone we wouldn’t recommend having a full 3D/4D this early . As the baby grows you become limited on the amount of the baby that you can see. At 21-24 weeks the baby is just starting to form their fat and their full facial features. This is still a great time to see the growth progress of your little one. At 25 to 27 wks baby has put on some fat and we start to get good face and body images plus baby is still very active, when you get closer to 28-30 weeks we can see baby has chubby chops and has started to look like he/she will at delivery.
We can never guarantee full face imaging as baby is in charge and we can only see what ever baby allows, some are real show-offs and demand centre stage others are shy covering their faces with hands and feet, then we have the little cuddle bums they find a comfy corner to snuggle into while being rocked to the rhythm of mummy. With that being said, the mothers body type and babies positioning also plays a role, in obtaining good imaging. The all around best time to come in will be 25-30 weeks, when baby is a good size and still has room to move freely. As the baby nears 32 plus weeks, the baby starts to run low on room and fluid. We can and do scan up to 36wks with good results, but wouldn’t recommend you waiting this long, as at this time its very difficult if babies not in a good position.