Copper IUD
vs
External 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
Copper IUD

Copper IUD

A small copper device placed in the uterus that works for up to 10 years and is over 99% effective.
External Condom

External Condom

A non-hormonal barrier method that also lowers the risk of STIs, available over the counter.
Efficacy99.2% typical use

Most effective: over 99 out of 100 people successfully prevent pregnancy per year.

87% typical use

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

Cost$0–$1,424

Insurance: Usually

$0.5–$3 /per unit

Insurance: Varies

DurationUp to 10 yearsSingle use
ReversibilityReversibleReversible
STI ProtectionNoYes
How it works

Releases copper ions into the uterus that make the environment toxic to sperm and may prevent implantation if fertilization occurs.

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

PrescriptionRequired Prescription requiredOTC No prescription / OTC
Available Products5 products3 products
Side effects
  • Heavier or longer periods (especially first few months)
  • Increased cramping
  • Spotting between periods
  • Small risk of uterine perforation at insertion
  • Rare local irritation from latex or lubricants
Who shouldn't use this
  • Active pelvic infection or PID (FDA label Category 4)
  • Uterine anomaly preventing insertion (FDA label Category 4)
  • Wilson's disease (copper metabolism disorder) (FDA label Category 4)
  • Known copper allergy (FDA label Category 4)
  • Current pregnancy (FDA label Category 4)
  • Known allergy to latex (use polyisoprene or polyurethane instead)