How it works: A cervical cap (FemCap is the only brand available in the US) is a silicone cup you insert over your cervix along with spermicide.
Success rate: Of women who have never given birth, 14 out of 100 will become pregnant. For those who have given vaginal birth, 29 out of 100 will become pregnant.
Pros: It works similar to a diaphragm, and for $60-$75, a cervical cap will last up to two years. It's also covered by the Affordable Care Act.
Cons: It has similar drawbacks as the diaphragm: it cannot be used during menstruation, might be hard to insert, and does not protect against STIs. Plus, it requires a prescription.