Vaginal bleeding during early pregnancy is still common and can be caused by pre-eclampsia, spontaneous miscarriage, ectopic pregnancy, etc. Ultrasound, progesterone, BHCG and other laboratory tests must be performed to exclude ectopic pregnancy. Because ectopic pregnancy has the risk of hemorrhage and may be life-threatening, it is very dangerous. If ectopic pregnancy is ruled out and the pregnancy continues, consider preeclampsia and observe its regression: in one third of cases, it improves spontaneously and the pregnancy can be delivered successfully. No treatment is needed. Half of them are chromosomal abnormalities, such as exposure to teratogenic substances, or the fetus itself is genetically bad, which is equivalent to biological evolution, elimination of the bad baby and the next pregnancy with a good quality baby. The other half are other factors, such as luteal insufficiency, infection, etc. Internationally, it is believed that preterm miscarriage can be treated without the need for birth control drugs and bed rest. This is because blind birth control may leave a malformed fetus behind, and delivering a malformed baby is bad for the fetus itself, for the mother and her family, and for human genes. In case of repeated miscarriages (more than 3 times), it is necessary to keep the chorionic villi chromosome to find out the cause of miscarriage; in case of previous repeated miscarriages and clear luteal insufficiency, it is possible to use birth control drugs. In case of IVF or other special cases where the fetus is precious, depending on the condition, fertility preservation drugs can also be used. If you have vaginal bleeding in early pregnancy, you need to observe the amount of bleeding, if the bleeding does not stop and gets more and more, go to the hospital! If you don’t bleed anymore, have a routine checkup and explain your situation to your obstetrician.