External Condom
vs
Internal Condom

A side-by-side comparison of two birth control methods — efficacy, cost, how they work, and who shouldn't use them.

Side-by-side comparison

Method
External Condom

External Condom

A non-hormonal barrier method that also lowers the risk of STIs, available over the counter.
Internal Condom

Internal Condom

A soft pouch worn inside the vagina that blocks sperm and protects against STIs, available over the counter.
Efficacy87% typical use

Least effective: under 90 out of 100 people successfully prevent pregnancy per year.

79% typical use

Least effective: under 90 out of 100 people successfully prevent pregnancy per year.

Cost$0.5–$3 /per unit

Insurance: Varies

$2–$4 /per unit

Insurance: Varies

DurationSingle useSingle use
ReversibilityReversibleReversible
STI ProtectionYesYes
How it works

A physical sheath worn over the penis that blocks semen from entering the vagina and reduces skin-to-skin contact that transmits STIs.

A soft, loose-fitting nitrile pouch lines the vagina and collects semen. The inner ring anchors it at the cervix and the outer ring stays outside the vaginal opening.

PrescriptionOTC No prescription / OTCOTC No prescription / OTC
Available Products3 products1 product
Side effects
  • Rare local irritation from latex or lubricants
  • Mild irritation or discomfort
  • Noise during use if not positioned correctly
  • Slippage with incorrect insertion
Who shouldn't use this
  • Known allergy to latex (use polyisoprene or polyurethane instead)
  • Sensitivity to nitrile (rare)