What Your Baby Is Doing When You Have a 4D Scan

The best time to have your 4D scans at the London clinic is usually between 26 and 30 weeks. At this stage, your baby’s face should become more visible on the scan, but he or she should still be in a good position for a 4D ultrasound.



1. 26 Weeks: From about 26 weeks, your baby will start building up fat under his or her skin in preparation for birth. Once this is in place, you will be able to see your baby’s face rather than the underlying skull when you have 4D scans in London. Your baby’s eyes are also beginning to open at this time, so you may see him or her blinking on the scan, and you can probably get a reaction to your voice or to other sounds.


2. 27 Weeks: By this week your baby should be very busy. Babies at 27 weeks can open and close their eyes and they often try sucking on their fingers or thumbs. Sometimes we even see this during the 4D scans. Babies at this stage also have a regular pattern of sleeping and waking, so try to time your scan appointment based on when you tend to feel your baby moving around.


3. 28 Weeks: Babies become more attentive to both sound and light at around 28 weeks. Your baby may actually react to a light shone on your belly as well as to the sound of a familiar voice from outside.


4. 29 Weeks: Your baby is growing quickly, with the brain developing particularly rapidly at this point in the pregnancy. If you have a larger baby or you are expecting twins, you might want to book your 4D scans in a little earlier.


5. 30 Weeks: Your baby starts to grow even faster from 30 weeks. The lungs and digestive system are almost completely developed at this point, so your baby just needs to get bigger before he or she will be ready to make an appearance. After 30 weeks, it can be difficult to get a clear picture during 4D scans, so we advise that you come in to our London clinic by 30 weeks, if possible.

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The contents on this site is for information only, and is not meant to substitute the advice of your own physician or other medical professional.