The process of painless abortion on the 40th day of pregnancy mainly includes anesthesia, disinfection, cervical dilatation, uterine cavity suction, and checking for contractions. First of all, general intravenous anesthesia is required. After the pregnant woman is placed in a good position, the vulva and vagina are sterilized, sterile towel sheets are laid out, the vagina is opened with a vaginal dilator, the cervix is exposed, the cervical canal is sterilized, and the size of the uterine cavity is detected with a metal probe. Then the cervix is dilated with a dilatation rod and the suction tube is inserted into the uterine cavity until the whole inner wall of the uterus is rough and then the suction is stopped. After this is done, you need to check for the integrity of the meconium and chorionic villi in the suctioned material and check for uterine contractions. If a woman is pregnant for more than forty days to do painless abortion surgery, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the growth and development of the fetus.