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I got an IUD 2 years ago. Ever since I got it my periods are every other week and last 5 days. Is this normal? I’ve been on lots of different oral birth control pills and this never happened.
Most forms of birth control suppress ovulation but with progesterone-only IUDs you are not stopping ovulation and can have an ovulation. This sounds like it could be happening in your case given you are bleeding every two weeks. I would see your gynecologist or primary care doctor to investigate further.