A fertilized egg that implants outside the uterine cavity is called an ectopic pregnancy, which is commonly referred to as ectopic pregnancy. Ectopic pregnancy is classified according to the site of implantation of the fertilized egg outside the uterine cavity: tubal pregnancy, ovarian pregnancy, abdominal pregnancy, broad ligament pregnancy and cervical pregnancy, among which tubal pregnancy is the most common. The clinical manifestations of ectopic pregnancy are related to the site of implantation of the fertilized egg, the presence or absence of miscarriage or rupture, and the amount and duration of bleeding. 1. Blood or urine Hcg is crucial for early ectopic pregnancy. In ectopic pregnancy, Hcg levels are lower than in intrauterine pregnancy. Continuous monitoring of blood Hcg, if the doubling time is greater than 7 days, ectopic pregnancy is very likely; 2. In tubal pregnancy, serum progesterone is approximately between 10-25ng/ml, if the value of serum progesterone is >25ng/ml, the chance of ectopic pregnancy is <1.5%, if its value is <5ng/ml, consider intrauterine pregnancy miscarriage or ectopic pregnancy; 3. Ultrasound examination of early pregnancy is usually determined at around 6 weeks of menopause It also helps to clarify the site and size of the pregnancy; 4. Laparoscopy is the gold standard for the diagnosis of ectopic pregnancy, and it can be performed at the same time as the diagnosis is confirmed. Therefore, if the hcg does not double well and the progesterone does not rise steadily after 30 days of pregnancy, you should be alert to the occurrence of ectopic pregnancy. If you have abdominal pain and irregular vaginal bleeding, do not blindly keep the pregnancy, but wait until about 40 days to perform ultrasound to diagnose whether the gestational sac is inside or outside the uterus, and then perform further treatment. However, we should pay special attention to the fact that sometimes the gestational sac is small, less than 1 cm, and sometimes there is a possibility of a false gestational sac, that is, the gestational sac is caused by fluid in the uterine cavity, so we should not easily diagnose an intrauterine pregnancy at this time, and ultrasound is usually needed to determine it.