The IUD (IntraUterine Device) is pretty cool — a small T-shaped device that''s inserted (by your doc) into the uterus. The copper IUD has copper wiring and collars around the T-shaped frame and it does not contain any hormones.
It works by affecting the motility and viability in sperm i.e. it creates an inhospitable environment for the sperm. Plus, there''s a local inflammatory response that''s also created in the uterus.
Since it doesn''t contain any hormones and it works locally, it doesn''t actually affect your ovulation or production of hormones like the pill does or like the hormonal IUD can in some situations. So, you can still reap the rewards of naturally cycling hormones while you have the benefit of non-hormonal contraception.
But, it can cause heavier bleeding and more discomfort/pain for many people especially in the first 3-6 months of being inserted which unfortunately (and understandably) is a big reason people ditch the copper IUD soon after insertion.
Effective as a contraceptive
Non-hormonal and does not interfere with ovulation
10-year shelf-life, so it''s no fuss (apart from insertion at the doctor''s office)
Effective as emergency contraception
Doesn''t protect against STIs
May cause heavy bleeding especially in the first 3-6 months
It can be painful/uncomfortable to insert and may lead to some uterine cramping in the first few weeks after insertion
It releases a bit of copper locally which hasn''t shown to be problematic, but it is not suitable for those with a copper allergy
It can come out (slim chance which is more likely soon after insertion, especially if inserted post-partum) and there is a small risk of uterine perforation
