Agreed, but IUDs by definition are implanted into the uterine wall, manually. Doctors can make mistakes or their hands can slip, causing a perforated uterus, which in turn can cause infertility.
But the doctor did not tell you how often that happens. So you have some unknown risk - how is anyone expected to make an informed choice?
Everything carries some risk. Female hormonal contraception carries some risk of death. (About 12 women per 10,000 taking the pill will experience a blood clot each year. This is potentially a life-changing or even life ending event.)
