The 40 days belong to the early stage of pregnancy, when the gestational sac is still particularly small, and the gestational sac is mainly formed by the villi, so the gestational sac discharged from a 40-day medical abortion is a white, flesh-like substance, so small that it can float if this pile of substance is placed in water. After a medical abortion or an abortion, the doctor also determines if the pregnancy sac looks like flesh based on whether or not he sees this pile of tissue to determine if it is clean. Whether it is an abortion, a medical abortion or a spontaneous abortion, the best way to determine if the gestational sac is clean is to have an ultrasound. It is also important to pay attention to the bleeding after delivery, and to seek medical attention at any time if there is a lot of bleeding or significant abdominal pain.