An IUD is better than a bracelet. The IUD, also known as an intrauterine device, is a contraceptive device that is placed inside the uterine cavity and achieves contraceptive effect through local tissue response to it. Because its effect is localized, it will not affect the endocrine system and will not cause breast enlargement, breast nodules, breast fibroids, fibroids, endometrial polyps, endometrial hyperplasia and other endocrine hormone level disorders. IUD is the placement of a subcutaneous implant, which is medicinal in nature, mainly placed into a levonorgestrel implant to provide contraceptive effect, which can affect the endocrine hormone level. Irregular vaginal bleeding or spotting-like bleeding can occur, and a few women can also experience amenorrhea, body fat and other symptoms. If there are breast diseases, uterine fibroids, endometrial hyperplasia and other diseases, it is not recommended to place subcutaneous implants, which may aggravate the symptoms of endocrine hormone level disorders.