After 16 weeks of pregnancy without vomiting and no fetal movement, you can judge the development of the fetus by feeling the fetal movement, listening to the fetal heartbeat, and doing ultrasound. 1. Fetal movement: generally 16 to 18 weeks pregnant women can feel the fetal movement, according to the fetal movement to determine fetal survival and development. 16 weeks pregnant due to the small amplitude of fetal movement has not felt the fetal movement is normal, generally will gradually appear slight fetal movement, can be carefully observed, if you can feel the fetal movement means that the fetus survival and development. 2. Listen to the fetal heart: if the pregnant woman’s own sensitivity is poor, early pregnancy reaction has disappeared, you can go to the hospital to listen to the fetal heart using a fetal heart rate, the general fetal heart rate of 110-160 beats per minute is normal, indicating that the fetus is developing. 3. Do ultrasound: 16 weeks pregnant can also go to the hospital to do ultrasound to check fetal development, according to the head circumference, abdominal circumference, biparietal diameter and other indicators to determine whether the fetal development is normal and whether it is in line with the normal gestational weeks.