Leakage is a possible situation during abortion, mostly due to the small size of the gestational sac. If aspiration leakage occurs, it can be judged from the following aspects: a. If the early pregnancy reaction does not improve after the abortion procedure, or the vomiting reaction becomes more and more serious, consider aspiration leakage. Because the hormone level in the body of patients with missed aspiration will not change, the vomiting reaction will not disappear due to the influence of hormone level, so it will lead to the aggravation of the reaction. Secondly, if the HCG level does not decrease or increases after the blood test, you should consider aspiration. If the ultrasound indicates that the gestational sac is still in the uterine cavity, it can be confirmed that the aspiration is missed, and in this case, surgery is needed again.