What is a potential side effect of using an IUD?

Using an IUD, particularly the non-hormonal copper IUD, can indeed result in heavier menstrual periods. This is due to the presence of the IUD itself, which can stimulate the uterine lining and lead to more intense menstrual flow. Additionally, some hormonal IUDs may initially cause irregular bleeding or spotting, but over time, many users find that their periods become lighter or may even stop altogether. However, in the case of the copper IUD, heavier menstrual bleeding is a well-documented side effect that can affect individuals who use this method of contraception.

The other potential side effects listed, such as increased risk of ovarian cancer, weight gain, and increased libido, are not commonly associated with IUD use. Most research suggests that the copper IUD does not significantly impact weight or libido, and any relationship to ovarian cancer risk is more complex and not directly linked to IUD use. Thus, the answer focusing on heavier menstrual periods accurately reflects a known and common side effect of using an IUD.