Cervical Cap
vs
Vasectomy

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
Cervical Cap

Cervical Cap

A small silicone cap that fits over the cervix by suction, used with spermicide before sex.
Vasectomy

Vasectomy

A permanent outpatient procedure that blocks the vas deferens so sperm cannot enter the semen.
EfficacyLeast effective see details

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

99.85% typical use

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

Cost$90–$120

Insurance: Usually

$0–$3,500

Insurance: Usually

DurationReusable for 2 years (replace every 2 years or sooner if damaged)Permanent
ReversibilityReversiblePermanent
STI ProtectionNoNo
How it works

A small silicone cap fits snugly over the cervix and stays in place by suction, blocking sperm from entering the uterus. Used with spermicide inside the cap.

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.

PrescriptionRequired Prescription requiredOTC Procedure (in-person)
Available Products1 productNo branded products yet
Side effects
  • Vaginal irritation from spermicide
  • Discomfort if not fitted correctly
  • Unusual vaginal discharge if left in too long
  • Mild pain or swelling for a few days
  • Bruising or bleeding at the site
  • Sperm granuloma (small lump, usually harmless)
  • Chronic post-vasectomy pain syndrome (rare, 1-2%)
Who shouldn't use this
  • Cervical anomaly preventing fit
  • Active pelvic infection
  • Sensitivity to silicone or spermicide
  • Inability to insert or remove reliably
  • Uncertainty about future fertility desires
  • Active local or systemic infection
  • Bleeding disorder