Occasionally a day in mid-pregnancy do not feel fetal movement, may be a normal physiological phenomenon, if there are no other symptoms, can not intervene in the cure, pay attention to observation can be; may also be caused by intrauterine hypoxia, fetal arrest, etc., should be timely medical examination, symptomatic treatment. 1. Normal physiological phenomenon: mid-pregnancy refers to the period from 13 weeks to 27 weeks of pregnancy, under normal circumstances in the 16-20 weeks of pregnancy can be conscious of fetal movement, if the pregnant woman is too small weeks of pregnancy, occasionally a day can not feel the fetal movement is also a normal phenomenon, without special treatment, pay attention to observation. 2. Intrauterine hypoxia: intrauterine hypoxia occurs in mid-pregnancy, may occasionally a day can not feel the fetal movement, pregnant women should consult a doctor in time, appropriate oxygen inhalation to increase the pregnant woman’s blood oxygen content, improve the hypoxic state. Can also change the position, adjust the left side of the lying position, reduce the pressure of the uterus on the inferior vena cava, so that the blood flow is more smoothly transported to improve hypoxia. 3. Fetal arrest: when pregnant women in mid-pregnancy occasionally one day can not feel the fetal movement, may also be due to fetal arrest, some pregnant women are also accompanied by vaginal bleeding, abdominal pain and other conditions, pregnant women should consult a doctor in a timely manner to check, can be injected into the uterine cavity of the method of induced abortion, so that the discharge of the gestational material, and at the same time recommended that the discharge of the gestational material should be carried out the appropriate pathology, genetics examination. It is recommended that pregnant women should seek timely medical examination to clarify the cause of the disease and then carry out targeted treatment.