Ectopic pregnancy can not find the gestational sac, first of all to determine whether the ectopic pregnancy, if the gestational week is relatively short, also can not find the gestational sac, the patient can be one week later again to review, and at the same time to monitor the HCG situation. HCG growth, if the review is highly suspected of ectopic pregnancy, you can use drugs under the guidance of the doctor conservative treatment, intramuscular injection of methotrexate treatment, the specific use of drugs need to follow the doctor’s instructions. Ectopic pregnancy did not find the gestational sac, may be because the gestational sac has not yet grown, and at this time we should pay attention to and intrauterine pregnancy, in order to avoid misdiagnosis. If the possibility of ectopic pregnancy is suspected to be high by monitoring HCG and reviewing ultrasound, methotrexate can be used systemically under doctor’s supervision to inhibit the proliferation of trophoblast cells, destroy chorionic villi, and cause necrosis, detachment, and absorption of embryonic tissues. Blood tests for HCG will be taken on the 4th and 7th day of the medication to observe the effect of conservative treatment. The process of conservative treatment should be closely monitored and attention should be paid to the patient’s condition, if there is any abnormality, it should be dealt with in time. If a woman suspects ectopic pregnancy when she is pregnant, she should consult a doctor for timely examination and follow the doctor’s instructions.