It is common for babies to turn their heads down by the 35th week of pregnancy, but it doesn't always happen. The position of the baby can change even up until labor begins. If your baby remains in a breech position (head up) close to your due date, your healthcare provider may recommend a C-section delivery. However, there are techniques such as external cephalic version that can be attempted to manually turn the baby into the head-down position before considering a C-section. It is best to discuss your specific situation with your healthcare provider who will evaluate factors such as the size and position of your baby, as well as any other medical considerations, before making a decision about the mode of delivery.