At 10-14 weeks of pregnancy, the embryo has gradually grown, the placenta has formed, and the uterus has also grown. At this time, it is usually necessary to interrupt the pregnancy due to contraceptive failure. Those who are not suitable for continuing pregnancy due to various diseases can undergo artificial abortion. However, in the following situations, artificial abortion is not suitable for the time being.

1. Various acute infectious diseases or acute attacks of chronic infectious diseases, severe systemic diseases (such as heart failure, high blood pressure with obvious symptoms, tuberculosis accompanied by high fever, severe anemia, etc.) cannot be tolerated Operator.

2. Acute reproductive organ inflammation, such as vaginitis, severe cervical erosion, pelvic inflammatory disease, etc.

3. Those whose acidosis caused by severe vomiting of pregnancy has not been corrected.

4. Those whose body temperature is above 37.5℃ twice within 4 hours before surgery.