22 weeks the fetus has been moving non-stop may be physiological reasons, external stimuli, fetal hypoxia and other factors. 1. Physiological reasons: 22 weeks of pregnancy is in the middle of pregnancy, the rapid growth and development of the fetus, the activities in the uterus will gradually increase, the appearance of the fetus has been moving, and has a certain regularity, which is a normal physiological phenomenon. 2. External stimulation: in normal life, pregnant mothers in 22 weeks pregnant, if listening to the rhythm of the music or noise, may stimulate the fetus, the fetus has been moving. 3. Fetal hypoxia: If the 22-week fetus in the uterus appears hypoxia, most of them are caused by the umbilical cord around the neck, contraction is too strong, placenta previa and so on, resulting in the phenomenon of the fetus keeps moving. After excluding physiological causes and external stimuli, the 22-week-old fetus keeps moving, you should seek timely and complete the relevant examinations, and actively diagnose and treat under the guidance of professional doctors.