“The bad effects of IUDs they don’t really talk about…” IUDs are very effective, but there are things you should know before choosing one. 1. Pain during insertion Let’s be honest — insertion can be very painful for some women, especially if you’ve never given birth. 2. Heavy bleeding & cramps (especially copper IUD) Periods can become heavier, longer, and more painful in the first few months. 3. Irregular bleeding (hormonal IUD) Spotting or unpredictable periods can last for months. 4. Hormonal