No — ultrasound cannot diagnose infertility, and no single scan can tell you whether you will conceive. What it can do is find structural causes that are treatable, count your antral follicles as a measure of ovarian reserve, and confirm across a cycle whether you are actually ovulating and when. For a lot of people that last answer turns out to be the useful one.
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A transvaginal scan gives a detailed view of the uterus and ovaries, and it can identify several conditions that affect fertility and are treatable:
This is the more important half of the answer, and it is why a normal scan is not a clean bill of fertility.
| Question | Can ultrasound answer it? | What does |
|---|---|---|
| Are my fallopian tubes open? | No — normal tubes are not visible | HyCoSy or HSG |
| What is my egg quality? | No | Nothing directly — age is the best proxy |
| What are my hormone levels? | No | Blood tests (AMH, FSH, LH, thyroid, prolactin) |
| Is my partner’s sperm normal? | No | Semen analysis |
| Do I have mild endometriosis? | Often not — only larger deposits show | Laparoscopy |
| Will I conceive? | No test answers this | — |
Roughly a third of infertility is attributable to male factors, which no gynaecological scan will detect. Investigating one partner alone is a common and costly detour.
Ultrasound contributes one specific number to fertility assessment: the antral follicle count. Early in the cycle, the small resting follicles in both ovaries are counted. Together with an AMH blood test, this estimates ovarian reserve — roughly, how many eggs remain available.
Two cautions worth holding onto. Ovarian reserve predicts how you are likely to respond to IVF stimulation; it is a much weaker predictor of natural conception. And a low count is not a verdict — plenty of people with a low antral follicle count conceive naturally.
This is where ultrasound earns its place for people trying to conceive naturally.
A tracking cycle means three or four short scans across one month. It shows whether a dominant follicle develops, whether it reaches mature size, whether it collapses at ovulation, and how the endometrium responds. Together those answer a question that home ovulation kits only approximate: are you ovulating, and on which day?
For someone with irregular cycles who has been trying for months, that is often the first concrete information they have had about their own body. Our follicular tracking page covers how a cycle is scheduled.
| Cycle day | What is assessed |
|---|---|
| Days 2–5 | Baseline scan — antral follicle count, ovarian and uterine assessment |
| Days 8–12 | Follicle development and endometrial thickness |
| Around ovulation | Whether the dominant follicle has released |
| Days 18–22 | Endometrial pattern in the luteal phase |
If you are booking a single scan and are unsure which day suits, call and we will advise based on what you want to find out.
The patients who benefit most from a private baseline scan before starting IVF are those who have not had a recent uterine assessment. Fertility clinics vary in how thoroughly they image the cavity before stimulation begins — some perform a saline sonohysterogram as standard, others rely on a routine transvaginal scan. When a patient arrives for a pre-IVF baseline and we find a polyp or a submucosal fibroid that was not previously identified, the conversation that follows is important: not because it is alarming, but because it changes the timeline. A polyp removed before transfer is a straightforward hysteroscopic procedure. A polyp found after a failed transfer is a delayed answer to a question that could have been answered earlier.
The second pattern we see regularly is follicular tracking in patients who are trying to conceive naturally but have irregular cycles and are unsure whether they are ovulating. A tracking cycle across one month — three or four scans — tells us whether a dominant follicle develops, whether it reaches maturity, and whether it collapses at ovulation. For a patient who has been trying for a year and has never had this confirmed, it is often the first concrete piece of information she has had about her own cycle. In many cases, the answer is that ovulation is happening — it is just happening later in the cycle than expected, and the timing of intercourse has been consistently off by several days.
The third pattern is the patient who has been given a diagnosis of “unexplained infertility” and wants a second look. In a proportion of these cases, a careful transvaginal assessment finds something that was not documented in previous scans — a small endometrioma, features consistent with adenomyosis, or a uterine cavity that is not quite as straightforward as the initial report suggested. These are not dramatic findings, but they are findings that change the clinical picture and the conversation with the fertility specialist.
Drawn from composite patterns across our patient population, not from any individual case. Not a substitute for individual medical advice or fertility specialist assessment.
See your GP rather than booking a scan if you have: severe pelvic pain; heavy bleeding with dizziness or faintness; a positive pregnancy test with one-sided pain or shoulder-tip pain (possible ectopic pregnancy — go to A&E); or if you have been trying to conceive for over a year, or over six months if you are 36 or older, when a full fertility assessment for both partners is the right next step.
No. It can identify structural causes such as fibroids, polyps, cysts and some tubal problems, and it can confirm whether you are ovulating. It cannot assess egg quality, hormone levels, sperm, or whether your fallopian tubes are open, and no scan predicts whether you will conceive.
Not usually. Normal tubes are not visible on ultrasound. A large fluid-filled blocked tube (hydrosalpinx) can sometimes be seen. Assessing tubal patency needs HyCoSy or HSG, which are specialised tests we do not offer.
A count of the small resting follicles in both ovaries early in the cycle. With an AMH blood test it estimates ovarian reserve. It predicts IVF response better than it predicts natural conception, and a low count does not mean you cannot conceive.
Follicle tracking across a cycle — three or four scans — shows whether a dominant follicle develops, matures and collapses. It is more definitive than home ovulation kits and often reveals ovulation is happening later in the cycle than assumed.
No. You can book directly. If you are under a fertility clinic, tell us and we can report to them.
Days 2–5 for a baseline and antral follicle count. Days 8–12 for follicle development. Call us if you are unsure — the right day depends on what you want to find out.
A pelvic ultrasound is £235. You receive instant verbal results at the appointment, with the written report following within 24 hours.
Related: follicular tracking, pelvic ultrasound, and coping with scan anxiety.
CQC-registered clinic · HCPC-registered sonographers · BMUS member · ICO-registered. Reports can be shared securely with your GP or fertility specialist at your request.
