None Costs vary. May be partly covered by insurance or Medicaid. May increase risk for urinary tract infections. Needs bi-annual replacement. Some protection Similar to costs for diaphragm.
More research is needed.
A combination patch that releases hormones. A weekly patch is used for three weeks and then stopped for a week. Vaginal rings that contain estrogen and progestin. Vaccines that immunize against pregnancy by inducing immune factors against sperm or eggs. Silicone plugs that are injected into the fallopian tubes and are reversible.