1- 3D ultrasound can not be done in the first 12 weeks of pregnancy:
It can be done from the beginning of the pregnancy but babies are very small at the early stage and they look like beans with tiny arms / legs. You can not see face features.
2- 3D Ultrasound uses more powerful sound waves:
3D technology uses exactly same sound waves as regular 2D ultrasound. The 3D image is re-constructed with many 2D pictures by computers. 3D sessions always start with a 2D picture.
3- You need a full bladder for 3D ultrasound session:
3D ultrasound sessions are done with empty bladder, you can use the washrooms before your appointment.
4- 3D Ultrasound burns your baby:
Tests on different tissues show ultrasound waves can cause some temperature increase in the tissue. But these trials are done with 50-100 times more powerful ultrasound and increased exposure time. That still doesn’t cause any permanent harm. The temperature increase in the human body (mother or baby) is same as 2D ultrasound and it is very minimal, not higher than body’s own temperature changes.
5- 3D Ultrasound shows the sex better than 2D:
It is completely up to the baby’s position, some babies show better with 2D and others show clearer with 3D. Your ultrasound technician checks the gender with both techniques in order to give you the correct answer. All 3D Ultrasound machines have 2D feature, both can be used during your 3Dultrasound session.