4D color ultrasound must be performed strictly according to the schedule, as both too early and too late inspections can affect the results and make prenatal exams more difficult. Generally, the best time for a single-fetus 4D color ultrasound is between the 20th and 28th weeks of pregnancy, with the optimal time being between the 24th and 26th weeks. For twins, the best time is between the 23rd and 25th weeks. The purpose of 4D ultrasound is primarily to screen for fetal malformations and defects. If the ultrasound is performed earlier than the 20th week, the fetus's limbs and organs may not have fully developed, making it difficult to effectively screen for malformations. If performed later than the 28th week, the fetus will be larger, and the amount of amniotic fluid and available space will be relatively smaller, leading to greater interference from bone echoes and potentially compromising the accuracy of the results.
4D color ultrasound diagnostic equipment is currently the most advanced ultrasound technology in the world. It is capable of displaying real-time dynamic images of your unborn baby or other internal organs. Although gender determination is technically possible through 4D ultrasound, it is prohibited in China. High-definition 4D ultrasound technology can automatically capture intrauterine photos and dynamic videos of the fetus, adding much interest and excitement for expectant mothers. It allows them to not only feel the baby's breathing and movements but also to see their baby's cute facial expressions and adorable actions. As for the timing of 4D ultrasound, the best time is generally after the 20th week of pregnancy. This is because at this stage, the fetus's basic development is complete, and both the size of the fetus and the amount of amniotic fluid are suitable for 4D ultrasound. Performing the ultrasound at this time ensures that there is sufficient space within the uterus for the fetus to move, resulting in clearer images.
