1. Changes in fetal position Six months into pregnancy, the position of the fetus has changed a lot. At this time, the fetus has grown to about 30 centimeters long and weighs about 600 grams. At this stage, the fetus has begun to take up most of the space, and this will continue to increase over time. 2. Determining the fetal position When you are six months pregnant, the doctor will use B-ultrasound and other examination methods to determine the fetal position. Normally, the fetus should be in a head-down position, which is the best way to deliver the baby. If the baby is in another position, timely measures need to be taken to correct it. 3. The impact of the baby on the mother’s body at six months of pregnancy