Placenta 1 at 25 weeks is basically without effect, but also continue to monitor the pregnancy under the guidance of the physician. The placenta has the functions of material exchange, synthesis, defense and immunity, and is an important organ for maintaining the normal growth and development of the fetus. Generally, the placenta begins to form around 8 to 10 weeks of pregnancy and gradually improves its function. When the ultrasound at 25 weeks of pregnancy suggests that the placenta is functioning at level 1 it is normal and has no effect on the fetus, continue to follow the doctor’s instructions and take obstetric tests on time to detect the pregnancy. When you are 25 weeks pregnant, you should pay attention to proper rest and increase the amount of food containing protein, calcium, iron and vitamins and other nutrients, such as meat, dairy products, eggs and fresh vegetables and fruits, to meet the growth and development of the fetus and the needs of the pregnant woman herself. Pregnant women with low risk of pregnancy should also maintain appropriate physical exercise under the guidance of a doctor to ensure appropriate weight gain during pregnancy.