If you don’t have your period after IUD and you are not pregnant, consider intrauterine lesions, endocrine abnormalities, other factors and other causes. 1. Intrauterine lesions: such as common endometrial or cervical tube adhesions, can lead to the IUD after the period did not come. When performing IUD surgery, it is necessary to enter the uterine cavity through the vagina to carry out the relevant operation. If the aseptic operation is not strict enough, it can lead to endometrial or cervical canal inflammation, which can lead to localized adhesion and cause delayed menstruation or amenorrhea. 2. Endocrine abnormality: Secondly, some women are nervous about the operation of the uterine cavity or have too much psychological pressure, which can also lead to endocrine abnormality, thus leading to the phenomenon of delayed menstruation. 3. Other factors: if the patient himself has dysfunctional uterine bleeding, adenomyosis and accompanied by bleeding and abdominal pain, this time through the IUD to promote menstruation to reduce or delay, so as to achieve the role of alleviating the symptoms of the disease, so the delay in menstruation after the IUD is a normal phenomenon. In the clinic, when the patient does not have menstruation after the IUD, and is not pregnant, and accompanied by other uncomfortable symptoms, it is necessary to go to the hospital in time.