Most of the babies settle down in a normal position or the head-down position by the end of the second trimester or beginning of the third trimester. It is usually between 28 to 30 weeks. However, some babies also move around after the beginning of the third trimester, and tend to take the normal position by the 31st or 34th week. If they do not come to a normal position and stay transverse up to the last stage, too, may cause labor complications..