Delayed menstruation with an IUD is approximately normal. Generally, if the delay is within one week, it is not a big problem. Because of the mechanical pressure on the endometrium after the ring is placed, the endometrium has poor blood circulation, causing ischemia, degeneration or necrosis, which affects the normal growth of the endometrium and leads to changes in the menstrual cycle. Generally, it occurs mainly within 1-3 months after the new IUD is placed. Later, as the endometrium slowly grows and develops normally, the menstrual cycle will also be normalized. If the menstruation is delayed for more than a week after the IUD is released, you can consider medication for proper menstrual regulation, such as Wuji Baifeng Pill, Dingkun Dan, Kuntai Granules and other Chinese medicines, which can regulate for a period of time and help improve the situation.