Fifteen weeks of pregnancy ultrasound to check the development of the fetus, the key need to see whether the fetus has a fetal heart and buds, the height of the fetus is about 10-12cm, the weight of the fetus is about 60-80g. Each fetus has different genes, and pregnant women have different physical conditions and intake of nutrients, so the development of the fetus is also different. As long as the fetal heart and buds can be seen on ultrasound, and the height and weight are within the normal range, it is normal. Fifteen weeks of pregnancy already belongs to the middle stage of pregnancy, as long as the development of the fetus is normal and relatively stable, the placenta is also fully formed and is not prone to miscarriage and other situations. Pregnant women need to pay attention to a balanced diet to increase nutrition, eat more carrots, celery, greens and apples, bananas, oranges and other fresh vegetables and fruits, and at the same time, you need to eat more calcium, iron and protein-rich food is conducive to the healthy development of the fetus.