It is believed that the best time for the third screening is the 30-32nd week of intrauterine development. The child is clearly visible, and he is still quite mobile. It is during this period that many parents decide to take not just a photo of their baby, but also record a video available during 4D ultrasound. After 32 weeks, the baby will continue to grow, and it will no longer fit entirely on the monitor screen. Therefore, "photo and video shooting" for the family archive will become impossible.