During this period, many children already occupy the final position in the uterus. Ideally, the baby should lie head down. An ultrasound at this stage of pregnancy allows the doctor to find out the position of the child and, if necessary, advise the mother on certain exercises that will help the fetus to take the correct position. Also in the middle of the third trimester, so-called late anomalies in the development of the child can be detected - usually this concerns the development of the kidneys.