Due to the 18th week of pregnancy fetal movement is relatively insignificant, the sudden immobility does not mean the cessation of development, you can pay attention to observe for a period of time, if there is no response for a long time or do not feel comfortable pregnant women, you can consult a doctor in time for examination. Generally speaking, the time of the emergence of fetal movement is different from that of the primigravida, the primigravida fetal movement may appear around 18-20 weeks, the primigravida will be relatively earlier by 2 weeks, around 16-18 weeks. Although pregnant women in the 18th week of pregnancy has appeared fetal movement, but at this time the fetal movement will be weaker compared to the later part of the pregnant women fetal movement is not obvious, 18 weeks of pregnancy fetal sudden immobility, does not mean that the fetus stops developing, generally do not need to be overly concerned about it, you can pay attention to observe for a period of time. For long-term no response or uneasy pregnant women, you can go to the regular hospital, through the ultrasound or fetal heart monitor in the abdomen to listen to the fetal heartbeat to confirm the diagnosis, to rule out the cessation of fetal development. It is recommended that pregnant women should pay attention to rest, maintain a good mood, avoid excessive anxiety, tension and other adverse emotional stimuli, and at the same time, pay attention to observing their own changes in life, and follow the doctor’s instructions for regular obstetric examination.