A 20 day ectopic pregnancy can be interpreted as a menopause that has lasted for 20 days, and most of these cases are around 50 days old, with embryos around 3-5cm. Normally, a pregnancy around 50 days is around 5cm, but ectopic pregnancy is a pregnancy outside the uterine cavity, which belongs to abnormal pregnancy, most of these pregnancies have abnormal growth rate and can’t reach the normal level of pregnancy, and there are mostly stunted embryos, some of which are around 3-5cm. There are also some embryos with insufficient blood supply to the left bed site, or there is a tubal pregnancy where the embryo stops developing and resorbs, in which case the embryo is relatively small and may be less than 3cm at around 50 days. Ectopic pregnancy is a more serious disease, there may be heavy bleeding and severe abdominal pain, so it should be taken seriously, hospitalized in strict compliance with medical advice, keep an eye on the vaginal bleeding, and inform the doctor as soon as possible when serious symptoms occur.