Delayed menstruation for the second time after abortion may be caused by intercourse and pregnancy again, or may be caused by ovarian endocrine dysfunction, or by post-operative complications. If the menstruation is delayed for more than one week, it is necessary to visit the gynecology department of the hospital and ultrasound examination is needed to clarify the cause.1. Pregnancy: Intercourse after abortion surgery, without good contraception, and pregnancy again leads to delayed menstruation. In this case, according to the patient’s wishes, the next step of treatment should be decided. It is generally recommended to continue the pregnancy to avoid damaging women’s health by abortion again in a short period of time; 2. Endocrine disorders: due to work strain, mental stress, stressful life and fast pace, etc., can cause endocrine disorders and lead to delayed menstruation. You can maintain an optimistic mood, learn to relieve your stress, do not be anxious, nervous, etc., and reduce negative emotions; 3. Post-operative complications: such as uterine adhesions, endometritis, adnexitis or pelvic inflammatory disease, etc., may lead to post-operative amenorrhea or reduced menstrual flow and a second delayed menstruation, sometimes accompanied by periodic lower abdominal pain or an enlarged uterus and blood accumulation. If you have abdominal pain and a small amount of vaginal bleeding, you should go to the hospital for an ultrasound examination as soon as possible, and the corresponding treatment should be carried out according to the examination results. After abortion, it is necessary to use strict contraception to prevent re-pregnancy. It is not advisable to take a tub bath to prevent water reflux infection; pay attention to rest and avoid eating cold, spicy and stimulating food or contact with cold water; keep the perineum clean and hygienic to avoid other inflammatory diseases; choose cotton underwear, wash and change them regularly, and play sports appropriately.