Since the launch of the two-child policy, if you have a requirement for fertility after ligation, you do not need a certificate to have tubal reversal surgery, just bring your ID card. The first is that the surgery should be done within 3-7 days after menstruation and the operation should be done only if there is no vaginal inflammation and the leucorrhoea is checked before the operation. Secondly, pay attention to the age. If the patient of tubal reversal surgery is over 40 years old, even if the reversal surgery is very successful, the chance of pregnancy will be reduced. Because the function of the ovaries decreases after the age of 40, the chance of conception also decreases, so be careful.