In the early stages of pregnancy, if for various reasons the pregnancy cannot continue and needs to be terminated, the commonly used abortion methods include medication abortion, intrauterine negative pressure suction abortion and forceps surgery. Early intrauterine pregnancy within 49 days of conception can be aborted by medication and intrauterine negative pressure abortion. When the fertilized egg has just implanted, if the pregnancy is to be terminated, drug abortion is usually the mainstay. However, since the gestational sac has not yet formed in the uterine cavity at this time, even if a medication abortion is performed, it may lead to the occurrence of incomplete abortion and abortion failure. It is best to choose 35-49 days of pregnancy when the gestational sac has been formed, but there is no obvious placental tissue formation, and it is easier to achieve a complete abortion by taking medication to carry out abortion.