Most pregnant women can hear the fetal heart with fetal heart Doppler after 13 weeks of pregnancy, with a stethoscope around 18-20 weeks, there are some differences in this situation, such as the thickness and thinness of the pregnant woman’s abdominal fat can affect. After pregnancy, you should go to the hospital regularly for obstetrical checkups. 16-20 weeks for Down’s syndrome screening, 22-26 weeks for 4D checkups. 26 weeks onwards, once every two weeks, pay attention to fetal movement, if fetal movement is too frequent or too slow, it is possible that the fetus is hypoxic, so go to the hospital in time. Pay attention to a reasonable diet and eat more fresh vegetables. Keep your mood relaxed, and appropriate activities will help the fetus grow and develop. Do not be overly nervous, every checkup doctor will listen to the fetal heart.