It is normal to not have a period with the Manned Ring. It is because the Mannedel ring is a kind of drug ring used to treat some diseases, such as endometrial hyperplasia, endometriosis, excessive menstruation and some other diseases. The drug placed inside it is mainly a highly effective levonorgestrel, which will cause the endometrium to atrophy. If the endometrium is thin, women will not have menstruation, and the patient has no uncomfortable symptoms, so it can be left untreated. If some patients feel that they do not have menstruation, and their bodies are sore, swollen, fat or uncomfortable, they can be monitored by hormone levels to understand whether they have entered the perimenopause and have some menopausal symptoms, and be given some estrogen drugs to improve the symptoms by adding the opposite.