The fetal movement at 20 weeks of pregnancy is not accurate, the fetus has not yet reached 20 weeks size, so you can not feel the fetal movement; or pregnant women are more obese, did not feel the fetal movement; may also be other reasons for fetal death in the uterus, caused by the disappearance of fetal movement, you can go to the hospital to do a check, to clarify the situation of the fetus. 1, inaccurate pregnancy week: most of the primiparous women, in 18 weeks to 20 weeks of pregnancy, will be the first time Feel the fetal movement. If you are a menstruating mother, the time you feel the fetal movement may be earlier than about 16 weeks. If the pregnant woman has irregular periods before pregnancy, ovulation will be delayed and fertilization will be delayed when she is pregnant, so calculating the week of pregnancy according to the last menstrual period will lead to inaccurate week of pregnancy and the actual week of pregnancy of the fetus will be small, and there may be no fetal movement at 20 weeks of pregnancy. If there is no other discomfort, you can temporarily observe and regularly review; 2, obese pregnant women: obese pregnant women have more abdominal fat, the feeling of fetal movement is poor, and may not feel fetal movement in the 20th week of pregnancy, you can temporarily observe. But need to pay attention to regular pregnancy check, such as vaginal bleeding and other discomforts, should promptly seek medical treatment; 3, fetal death in the uterus: if there is no fetal movement in 20 weeks of pregnancy, pregnant women are also accompanied by vaginal bleeding and other conditions, should promptly go to the hospital to listen to the fetal heart in the abdomen. If you can’t hear the fetal heart, you need to do fetal 3D ultrasound. Under the ultrasound, you can clearly see whether the fetal heart is normal or not. If you still can’t see the fetal heart, the fetus may be dead in the uterus, and you need to follow the doctor’s instruction for treatment such as uterine evacuation. At 20 weeks of pregnancy, you should keep your mood relaxed, eat a balanced diet and pay attention to regular pregnancy tests. If you experience vaginal bleeding and abdominal pain, you should seek medical treatment in time.