The reasons for a little blood in the toilet in the first month of pregnancy: first, a small amount of bleeding caused by the implantation of the gestational sac; second, does not exclude ectopic pregnancy; third, biochemical pregnancy; fourth, bleeding caused by hemorrhoids or anal fissures. The bleeding in early pregnancy needs to be observed to see if it is accompanied by other symptoms. At present, ultrasound examination cannot determine whether the pregnancy is intrauterine or not. First of all, wipe the perianal area with toilet paper to see if there is blood, whether the color is fresh and whether it is accompanied by dry stool or pain, which can clearly exclude bleeding caused by hemorrhoids or anal fissures. Secondly, if the blood HCG doubles every other day and the progesterone is at 20ng/L without abdominal pain, the chance of ectopic pregnancy or biochemical pregnancy is considered unlikely. If the bleeding does not increase continuously and is not accompanied by severe abdominal pain, it can be closely observed. 6-7 weeks after menopause, we can go to the hospital to review the ultrasound examination and see the presence of fetal heart and fetal buds, and the cause of the last bleeding can be determined to be the implantation of the gestational sac.