Antral follicle count (AFC) scan
An ultrasound scan, usually done internally, that counts the small resting follicles in the ovaries to estimate ovarian reserve and help plan fertility treatment.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- An AFC scan counts the small resting follicles in the ovaries to estimate ovarian reserve (egg quantity).
- It is most useful for planning fertility treatment such as IVF, where it predicts ovarian response to stimulation.
- It does not measure egg quality and does not predict natural conception; age matters more for that.
- Counts can vary between operators and cycles, so a single number should be interpreted by a specialist, not read as a verdict.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Gives an estimate of ovarian reserve to help plan fertility treatment such as IVF.
Using the count on its own to decide whether you can conceive naturally or when to try.
You may feel mild pressure from the internal probe. The count is often discussed as the scan is done, and you can ask questions throughout.
A specialist who interprets the count alongside your age and is honest about its limits.
You may feel mild pressure from the internal probe. The count is often discussed as the scan is done, and you can...
You can get dressed and carry on as normal immediately. There are no restrictions and no recovery time.
A clinician should explain what your count suggests about ovarian reserve, how it compares for your age, and what...
The count may feed into a plan for trying naturally, further tests, IVF or egg freezing, always alongside your age...
What is an antral follicle count (AFC) scan?
An antral follicle count (AFC) scan is an ultrasound scan that counts the small resting follicles, called antral follicles, in both ovaries. Each antral follicle contains an immature egg, so the number gives an estimate of your ovarian reserve, which means roughly how many eggs you have left.
The scan is usually done internally (transvaginally), with a slim probe placed gently into the vagina, which gives a clearer view of the ovaries than a scan over the tummy. It is often timed to the early part of your cycle. The total count from both ovaries is the result.
AFC is mainly used to help plan fertility treatment such as IVF, because it predicts how the ovaries are likely to respond to stimulation medicines, much like the AMH blood test. A very low count may suggest a weaker response and a very high count may flag a risk of over-response.
As with AMH, it is important to know the limits. AFC estimates egg quantity, not egg quality, and it does not predict whether you can get pregnant naturally or when you will have a baby. Age remains the strongest factor in natural fertility, and counts can vary between operators and cycles, so the result needs careful interpretation.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
AFC scan vs AMH blood test
| AFC scan | AMH blood test | |
|---|---|---|
| What it is | Ultrasound count of follicles | Blood hormone level |
| What it estimates | Ovarian reserve | Ovarian reserve |
| Cycle timing | Often early cycle | Usually any day |
| Predicts natural pregnancy? | No | No |
AFC and AMH give similar information and are often used together. Neither measures egg quality or predicts a natural pregnancy; both mainly help plan treatment.
Preparing for your test
- Ask why the scan is being done and what decision the result will inform.
- Check whether it needs to be timed to a particular day of your cycle, as it often does.
- You can usually eat and drink normally; an internal scan does not need a full bladder.
- Wear clothing that is easy to change for an internal scan, and expect privacy and a chaperone if you wish.
- Tell the team if an internal scan would be difficult or distressing, so an alternative can be discussed.
- Mention any condition such as PCOS or previous ovarian surgery, which can affect the count.
- Think about how you would feel about a low, normal or high count and what you would do next.
What happens
For a transvaginal scan, you empty your bladder and lie back on a couch. A slim ultrasound probe, covered and lubricated, is gently placed into the vagina. The sonographer looks at each ovary in turn and counts the small antral follicles, adding both sides together for the total.
The scan usually takes around 10 to 20 minutes. It can feel a little uncomfortable or cause mild pressure, but it should not be painful, and you can ask for it to stop at any time. A chaperone can be present if you would like one.
The count is often explained to you during or just after the scan. As with any ovarian reserve test, the number means little on its own, so a clinician should put it in context, including the strong effect of age and what the scan cannot tell you about egg quality or your chance of a natural pregnancy.
Is this test right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Using the count on its own to decide whether you can conceive naturally or when to try.
- Treating a single low count as a diagnosis of infertility.
- Relying on the scan to judge egg quality, which it cannot measure.
- Scanning without any plan to interpret the count alongside your age and history.
Delay or rearrange if…
- The scan needs to be timed to a particular day of your cycle that has not yet come round.
- You have new symptoms, such as severe pelvic pain or abnormal bleeding, that need assessment first.
- An internal scan would be too distressing without preparation or an alternative being discussed.
- You feel pressured into testing or treatment and have not had time to consider it.
Alternatives to discuss
- An AMH blood test, which gives similar information about ovarian reserve.
- A full fertility assessment, rather than a count in isolation.
- No test yet, with attention to age, timing and lifestyle, if you are early in trying to conceive.
- Seeing your GP for NHS investigation if you have been trying to conceive without success.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Gives an estimate of ovarian reserve to help plan fertility treatment such as IVF.
- Helps predict how the ovaries might respond to stimulation medicines.
- Can flag a higher risk of over-response (OHSS), so a safer dose can be chosen.
- Lets the clinician look at the ovaries and womb at the same time, sometimes spotting other findings.
- Results are usually available straight away, without waiting for a laboratory.
Risks & complications
- Mild discomfort or a feeling of pressure during an internal scan
- False reassurance from a 'normal' or high count, which does not guarantee a pregnancy
- Unnecessary worry from a 'low' count, which does not mean you cannot conceive
- Counts that vary between operators or cycles, making one number hard to rely on
- An incidental finding, such as an ovarian cyst or fibroid, that leads to further tests
- Difficulty getting a clear view, for example if the ovaries are hard to see
- Being steered towards treatment or egg freezing mainly on the basis of one count
- Significant distress from a result given without proper explanation or support
- An internal scan being too uncomfortable to complete, needing an alternative approach
An AFC scan is a low-risk test, so the main concern is how the result is interpreted. A low count does not mean pregnancy is impossible, and a reassuring count does not undo the effect of age on egg quality. Ask the clinician what your count means for your age, and what they would and would not change because of it. Be cautious if a clinic uses a single count to sell treatment.
Published figures to discuss
An antral follicle count scan is a low-risk test, so it has no meaningful complication rate. The important uncertainty is in the count itself. AFC predicts ovarian response to IVF reasonably well, but it does not predict natural pregnancy and does not measure egg quality. Counts can also vary between operators and between cycles, so a single number is best interpreted cautiously alongside age and other tests rather than treated as a fixed value.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Physical harm from the scan | Very low | A transvaginal ultrasound can be uncomfortable but should not be painful; there is no radiation. | Guide sourcesClinical context |
| Prediction of IVF response | Useful for estimating ovarian response, not egg quality | AFC helps dose stimulation and predict poor or excessive response, but it cannot say whether eggs are chromosomally normal. | Guide sourcesClinical context |
| Cycle-to-cycle and operator variation | Recognised | Small follicles can be counted differently by different scanners or at different cycle points. | Guide sourcesClinical context |
| False reassurance about fertility | Recognised | A reassuring AFC does not rule out tubal disease, endometriosis, sperm factors, ovulation problems or age-related egg-quality decline. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from an ultrasound scan. The 'afterwards' is mostly about understanding the count and what it does, and does not, mean for you.
- Mild pressure or discomfort during an internal scan, easing as soon as it ends
- No physical after-effects and no need for time off
- Mixed feelings about the count, whatever the number
- Needing a specialist to put the count into context before it makes sense
Aftercare
- Ask for the count and the clinic's interpretation in writing.
- Make sure the result is discussed alongside your age, not in isolation.
- Do not make irreversible decisions, such as paying for treatment, on the strength of one count.
- Ask how the count fits with any AMH result, as the two should broadly agree.
- Take up counselling or support if a low count is upsetting.
- Keep the result to compare if the scan is repeated or if you see another specialist.
- A written record of your follicle count
- A clear explanation of what it means for your age
- A note of how it compares with any AMH result
- Your GP or specialist informed if relevant
- Support or counselling details if the result is distressing
- Questions ready for any follow-up appointment
⚠ Get urgent help if…
- Severe or worsening pelvic pain during or after the scan
- Heavy or unusual vaginal bleeding, which should be checked regardless of the scan
- Fever or feeling unwell after the scan, which is uncommon and should be reported
- Feeling hopeless or overwhelmed after a result, when you should seek support
- Being pushed to buy treatment urgently because of a single count, which is a reason to pause
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
The result is the total number of antral follicles seen in both ovaries. NICE has suggested broad thresholds to help predict IVF response, with a low response considered likely with a count of about four or fewer, and a high response with a count above roughly sixteen, though clinics may use slightly different cut-offs. These are guides for treatment planning, not lines that decide whether you can have a baby.
A low count does not mean pregnancy is impossible, and a normal or high count does not guarantee it. The scan estimates egg quantity, not egg quality, and it does not predict natural conception. Counts can also vary between operators and cycles, so a specialist should interpret the number alongside your age and other tests.
The antral follicle count falls gradually with age as the egg supply declines, so a result is a snapshot rather than a fixed value. It may be repeated before a treatment cycle, but frequent repeat scanning rarely changes the bigger picture, which is shaped mostly by age. Your clinician should explain whether and when a repeat would actually be useful.
Related tests, treatments or support
An AFC scan is often combined with an AMH blood test, as the two give similar information about ovarian reserve and should broadly agree. It may also be done with other hormone blood tests as part of a fuller fertility assessment. Together they build a picture of ovarian reserve, but none of them measures egg quality or predicts a natural pregnancy.
Follow-up & long-term care
Your follicle count should be discussed with a clinician who can explain what it means for you. If you are planning IVF or egg freezing, it helps guide the medicine dose and what to expect. If you are simply checking your fertility, the most important follow-up is an honest conversation about age, timing and the limits of the test, rather than treatment driven by the count alone.
- Keep a record of your count for future comparison.
- Repeat scanning only when a clinician advises it will change a decision.
- Review your plans with a specialist if your circumstances change, as age keeps moving.
- Support egg health indirectly with not smoking, a healthy weight and limited alcohol.
Repeat, follow-on and what comes next
- A count may be repeated before a treatment cycle, as numbers can vary between cycles.
- The count falls with age, so results change over time and a single value can soon be out of date.
- A low count does not rule out pregnancy, and the scan does not need to be repeated frequently to be useful.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A specialist who interprets the count alongside your age and is honest about its limits.
- A written record of the count you can share with your GP.
- Counselling offered if a result is distressing.
- A sensible plan that uses the count as one input, not the sole reason for treatment.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether the scan is on its own or part of a wider fertility assessment.
- Whether a specialist consultation to interpret the count is included.
- Who performs and reports the scan, and their level of expertise.
- Whether an AMH blood test is done at the same time.
- Any follow-up appointment to discuss results and next steps.
- Whether a repeat scan is recommended and charged separately.
- Whether the price is for the scan alone or a bundle of tests.
- Whether a consultation to interpret the count is included.
- Who will perform and report the scan.
- The cost of any AMH test done alongside it.
- Follow-up consultation costs after the scan.
- What happens, and what it costs, if the scan finds something needing further tests or treatment.
On the NHS? An antral follicle count scan is usually available on the NHS as part of planned fertility treatment such as IVF; a scan requested purely to check egg reserve is often only available privately. Whether NHS-funded fertility care is open to you, and who qualifies, is decided by local NHS commissioning and differs between areas and across the four UK nations (England, Scotland, Wales and Northern Ireland). These rules can also change over time, so check your current eligibility with your GP, the NHS or HSC fertility service in your area, or the clinic, rather than assuming a national entitlement.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Being given a count with no explanation of what it does and does not predict.
- Treating a low count as proof of infertility, or a high count as a guarantee of pregnancy.
- Not being told that the scan measures egg quantity, not quality, and not natural conception.
- Being moved quickly from a low count into paid egg freezing or IVF without a balanced discussion.
Marketing red flags
- Selling the scan as a test of 'how fertile you are' or a prediction of a baby.
- Using a single count to push egg freezing or IVF.
- Quoting a count without explaining how it can vary or what it cannot show.
- Implying a normal count means you can safely delay trying for years.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Why am I having this scan, and what decision will the count inform?
- What does my count mean alongside my age?
- How does the count compare with my AMH result?
- What would you change based on a low, normal or high count?
- Could the count vary if it were repeated, and how reliable is it?
- What does this scan not tell me about my chance of a baby?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my test, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this test not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Does a low follicle count mean I cannot get pregnant?
Does the scan have to be internal?
Does the scan hurt?
How is this different from an AMH test?
Is the scan available on the NHS?
Should I freeze my eggs because of my count?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: HFEA — A-Z fertility glossary (ovarian reserve, AMH) NICE NG257 — Fertility problems: investigation and management British Fertility Society — What exactly is ovarian reserve? Correlation of AMH, FSH and antral follicle count by age — study (PMC) Ovarian reserve and natural conception — review (PMC) NHS inform (Scotland) — infertility and fertility access NHS Wales — specialist fertility services commissioning policy (CP38) Regional Fertility Centre, Belfast Trust (Northern Ireland)
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
Related guides: AMH blood test (ovarian reserve) · Hormone blood tests (fertility) · Fertility assessment (fertility MOT) · IVF · Genetic carrier screening