The vague pain in the stomach of a woman who has just become pregnant is mainly due to the following three situations: First, the uterus will gradually increase in size in the early stages of pregnancy, and in the process of uterine enlargement, the uterus will have a vague pain, which is a physiological phenomenon and does not require special treatment. Secondly, the manifestation of miscarriage, when there is a pre-eclampsia miscarriage, it is easy to have stomach pain or vaginal bleeding, it is recommended to go to the hospital as soon as possible. If the embryo is developing well, active fetal preservation should be given, and if the embryo has stopped developing, the pregnancy should be terminated as soon as possible. Thirdly, in case of ectopic pregnancy, lower abdominal pain is also likely to occur. Therefore, if pregnancy is detected, ultrasound should be done as soon as possible to exclude ectopic pregnancy.