Compare

Internal Condom vs Vasectomy

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

Last verified Updated

Side-by-side comparison

  • Internal Condom A soft pouch worn inside the vagina that blocks sperm and lowers the risk of STIs, usually obtained with a prescription.
  • Vasectomy A permanent outpatient procedure that blocks the vas deferens so sperm cannot enter the semen.
Method
Internal Condom A soft pouch worn inside the vagina that blocks sperm and lowers the risk of STIs, usually obtained with a prescription.
Vasectomy A permanent outpatient procedure that blocks the vas deferens so sperm cannot enter the semen.
EfficacyInternal Condom 79% typical use

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

Vasectomy 99.85% typical use

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

CostInternal Condom $0–$3 per unit Insurance: UsuallyVasectomy $0–$1,000 Insurance: Varies
DurationInternal Condom Single useVasectomy Permanent
ReversibilityInternal Condom ReversibleVasectomy Permanent
STI protectionInternal Condom YesVasectomy No
How it worksInternal Condom

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.

Vasectomy

A clinician cuts, seals, or blocks the vas deferens so sperm cannot mix with semen during ejaculation. The body absorbs the sperm, and the semen remains normal in appearance and volume.

PrescriptionInternal Condom Required Telehealth PrescriptionVasectomy Required In-Person Procedure
Side effectsInternal Condom
  • Mild irritation or discomfort
  • Slippage with incorrect insertion
Vasectomy
  • Mild pain or swelling for a few days
  • Bruising or bleeding at the site
  • Sperm granuloma (swelling from leaked sperm that usually goes away on its own)
  • Chronic post-vasectomy pain syndrome (5% in a 2020 meta-analysis)
Who shouldn't use thisInternal Condom None reportedVasectomy
  • Uncertainty about future fertility desires
  • Known allergy or hypersensitivity to materials used in the procedure

Key differences

With typical use, 21 in 100 people using Internal Condom get pregnant in a year, vs 0.2 in 100 with Vasectomy (least effective vs most effective). How long it lasts: Internal Condom, single use; Vasectomy, permanent. Internal Condom: reversible. Vasectomy: permanent. STI protection: only with Internal Condom. Internal Condom: costs $0–$3 per unit. Vasectomy: costs $0–$1,000.