An IUD is a small T-shaped device placed in the uterus to prevent pregnancy for years at a time. Copper versions work without hormones. Hormonal versions thicken mucus and thin the lining. Both are among the most effective reversible methods available.

Insertion is a clinic procedure that can cramp hard for a short stretch. People deserve honest pain talk and options for that visit. Strings hang through the cervix so a clinician, and sometimes the user, can check the device is still where it belongs.

It does not stop STIs. Partners can still use condoms. Rarely the device moves or perforates. Sudden pain, fever, or a missing string is a call, not a wait-and-see hobby.

Removal is also a clinic visit. Fertility typically returns on its own timetable after the IUD is out.