Children sitting on the mother’s stomach around 4 weeks pregnant generally have no effect. Pregnancy time is generally calculated from the first day of the last menstrual period, 4 weeks pregnant refers to the 28 days of pregnancy, this time the fertilized egg can not come to the uterine cavity to bed, sitting on the stomach will not affect the development of the gestational sac. Therefore, about 4 weeks pregnant children sitting on the mother’s stomach generally have no effect. For 4 weeks pregnant women, it is recommended to go to the hospital regularly to do ultrasound, monitor the gestational sac whether in the uterine cavity to exclude ectopic pregnancy, at the same time you can eat some appropriate folic acid tablets, avoid contact with harmful substances, and during pregnancy after the occurrence of tummy symptoms, it is recommended to consult a doctor in a timely manner.