If the menstrual cycle is very regular, the cycle is about 28-30 days, and most of the menopause is about 42 days, the ultrasound can determine the intrauterine pregnancy, and you can see the gestational sac and the yolk sac, you can choose to terminate the pregnancy with medication abortion or artificial abortion. However, if the woman’s menstrual cycle is very irregular, with the pregnancy test stick to detect pregnancy, may need to come to the hospital to take a blood test for HCG, through the value of HCG to infer the number of days of pregnancy, to determine the time to do ultrasound, ultrasound to determine the intrauterine pregnancy before choosing the medication abortion or abortion to terminate the pregnancy, most of the ultrasound to determine whether the medication abortion can be carried out, if the color of the ultrasound suggests that the embryo is bigger, it may not be possible to do the outpatient painless abortion. If the ultrasound indicates that the embryo is relatively large, you may not be able to do painless abortion in the outpatient clinic, and you can only be hospitalized to have a medication abortion or even induce labor.