Cervical screening usually starts around age 21, or within a few years of becoming sexually active, and is repeated every three to five years depending on which test is used. A Pap smear checks for abnormal cervical cells; an HPV test checks for the virus that causes most of those changes. Many clinics now run both together, since that combination catches more and lets you safely space screenings further apart.
What the test is actually checking
- Pap smear (cytology): a small sample of cells is gently collected from the surface of the cervix and examined under a microscope for abnormal changes.
- HPV test: the same sample (or a separate swab) is checked for the high-risk strains of human papillomavirus that cause nearly all cervical cell changes and cervical cancer over time.
- Why both together: HPV is the underlying cause; the Pap smear shows whether that infection has actually changed any cells yet. A negative result on both is the most reassuring combination, and it's why co-testing lets you wait longer before the next one.
When to start, and how often to repeat it
| Age group | Usual approach |
|---|---|
| Under 21 | Screening isn't usually recommended regardless of sexual activity — early HPV infections are extremely common and almost always clear on their own |
| 21–29 | Pap smear alone, generally every 3 years |
| 30–65 | Pap smear + HPV co-testing, generally every 5 years, or Pap smear alone every 3 years if co-testing isn't available |
| After 65 | Often stopped if recent screening history has been consistently normal — discuss with your doctor |
These are general intervals used widely in screening guidelines. Your own doctor may recommend a different schedule based on your history — a past abnormal result, HIV status, a weakened immune system, or DES exposure all shift how often you're screened.
What actually happens during the test
You lie down as you would for a routine pelvic exam, and a speculum is gently placed to allow a clear view of the cervix. A small brush or spatula collects cells from the cervix's surface — it takes a few seconds and may cause brief pressure or mild cramping, not sharp pain. There's no cutting, no injection, and no sedation involved. Spotting afterward for a day is normal.
What a result actually means
- Normal/negative: no abnormal cells and no high-risk HPV found — continue routine screening at your usual interval.
- HPV positive, Pap normal: the virus is present but hasn't (yet) caused visible cell changes. Many such infections clear on their own within one to two years; your doctor will usually recommend a repeat test sooner than your routine interval, rather than immediate treatment.
- Abnormal Pap (any grade): doesn't mean cancer — it means some cells look different from normal and need a closer look, usually with a colposcopy, to decide whether any treatment is needed.
HPV infection is extremely common and, for most women, clears without ever causing a problem. Screening exists to catch the small number of infections that don't clear and start changing cells — early, while it's still easily treatable.
Frequently asked
I've had the HPV vaccine — do I still need to be screened?
Yes. The vaccine protects against the HPV strains responsible for most cervical cancers, but not all of them, and it doesn't help if you were already exposed to a covered strain before vaccination. Routine screening still applies at the same intervals.
Does an abnormal Pap smear mean I have cancer?
No. Most abnormal results reflect cell changes that are mild, don't need treatment, and often resolve on their own with monitoring. Cervical cancer develops slowly, over years, which is exactly why regular screening is effective — it catches changes long before they could become cancer.
Is the test painful?
Most women feel pressure or brief mild cramping rather than pain. Being as relaxed as possible, and communicating with your doctor if something feels uncomfortable, helps it go more smoothly.
Can I get screened on my period?
Heavy bleeding can affect sample quality, so many clinics prefer to reschedule. Light spotting usually isn't a problem — check with your clinic when booking.
I'm not sexually active. Do I still need this test?
Recommendations are generally based on age rather than sexual activity alone, since HPV can occasionally be transmitted without penetrative intercourse. Discuss your personal risk and timing with your doctor.