Infertility is defined by time, not by sensation: no pregnancy after 12 months of regular unprotected sex — or 6 months if the female partner is 35 or older — and it affects up to 15% of couples — ACOG Committee Opinion 781, with the WHO estimating 1 in 6 reproductive-age people worldwide.
No symptom checklist is reliable alone — the commonest infertility has no symptoms at all — but certain signs change what you do next: a 34-year-old with 45-day cycles needs a different first step than one whose partner’s semen analysis shows 9 million sperm/mL.
How this article was researched: the ProIVF Medical Editorial Team reviewed ACOG, ASRM and AUA/ASRM guidance, WHO standards and peer-reviewed cohorts; every figure links to its primary source, reviewed by our Medical Advisory Board.
When Does It Count as Infertility?
The 12-month rule, and the exceptions
The standard definition is no pregnancy after 12 months of regular unprotected intercourse; every major guideline adds two age exceptions and one immediate case:
- Age 35 or older: evaluate and treat after 6 months, not 12 (ACOG 781; ASRM Committee Opinion 589).
- Age 40 or older: faster still — ASRM notes decline from about 32, steeper after 37.
- A known fertility-damaging condition (endometriosis, PCOS, prior pelvic infection, chemotherapy, undescended testis, an abnormal semen analysis): evaluate immediately.
The American Family Physician clinical version: evaluate before 12 months with risk factors, at 35 or older, or where conception needs assistance.
Can you be infertile with no symptoms?
Yes — and it is the rule, not the exception. ACOG diagnoses unexplained infertility in up to 30% of infertile couples: no symptom appeared, ovulation, tubes and sperm all test normal, and pregnancy still does not happen — ACOG 781.
Male factor contributes to 40–50% of couples, and most of those men have no complaints whatsoever.
Self-measurement is the related trap: in a survey of 97,414 women trying to conceive, 10% calling their cycles “regular” did not know their cycle length and 2.9% reported lengths outside the normal 21–35 day range — Reprod Health 2025 — irregularity never measured is never noticed.
What Are the Signs of Infertility in Women?
Female symptoms fall into four groups — ovulation, egg supply, uterus and tubes, pelvis — each with a different first-line test.
| What you notice | What it can point to | First test |
|---|---|---|
| Cycles over 35 days, under 8 periods a year | Anovulation, most often PCOS | Cycle history, AMH, testosterone, TSH, prolactin |
| Three months or more with no period | Hypothalamic amenorrhea, ovarian insufficiency, high prolactin | FSH, LH, estradiol, prolactin, TSH |
| Period pain that keeps you home, or pain during sex | Endometriosis, adenomyosis | Ultrasound; laparoscopy if imaging is normal |
| Pain or fever after a past infection or pelvic surgery | Tubal factor | HSG or saline-infusion sonography |
| Hot flashes, night sweats, shorter cycles | Low ovarian reserve, early menopause | FSH, estradiol, AMH |
| Two or more pregnancy losses | Recurrent loss | Chromosomes, uterine imaging, thyroid and antiphospholipid testing |
Are long or missing periods a fertility red flag?
Yes. PCOS criteria treat cycles longer than 35 days or absent periods as the marker of ovulation dysfunction, alongside raised androgens and AMH; the simplified East Asian criteria use AMH 37.0 pmol/L or above for polycystic morphology — Ann Acad Med Singap 2023.
PCOS is mostly undiagnosed: the WHO estimates 10–13% of reproductive-age women affected and up to 70% unaware. Anovulation is treatable, so “irregular periods” deserves a workup, not a shrug.
Is severe period pain a sign of infertility?
Painful periods are not infertility, but they are the symptom most normalized on the road to an endometriosis diagnosis.
Endometriosis affects up to 10% of women worldwide, and the 2025 JAMA review reports 90% with pelvic pain, painful periods or pain with sex, 26% reporting infertility, and diagnosis delayed an average of 5 to 12 years, most seeing three or more clinicians first — JAMA 2025. It is also found in roughly 50% of women investigated for infertility — Best Pract Res Clin Obstet Gynaecol 2024.
What signals that ovarian reserve is running out early?
Primary ovarian insufficiency — ovarian function lost before age 40 — affects about 1% of women — Nat Med 2023 — and reads like perimenopause a decade early: cycles shortening from 28 to 21 days then lengthening, hot flashes, night sweats, vaginal dryness.
High FSH with low estradiol on two occasions, plus an AMH low for age, is the diagnostic pattern: irregular cycles before 40 mean testing quickly.
What points to tubal damage?
Tubal disease is the quietest category: its classic cause is an infection you never noticed, as chlamydia and gonorrhea often cause silent pelvic inflammatory disease.
Chlamydia and gonococcal infections are frequently mild or silent; affected patients “present later with tubal factor infertility, ectopic pregnancy, or chronic pelvic pain.” — Journal of Infectious Diseases, 2021, PMID 34396413
A history of pelvic surgery, ruptured appendix, ectopic pregnancy or documented chlamydia justifies testing tubal patency directly — HSG (X-ray dye study) or sonogram — rather than waiting for symptoms — Am Fam Physician 2023.
What Are the Signs of Infertility in Men?
Male factor is involved in 40–50% of couples, and in about 20% it is the only problem found (ACOG 781; Boitrelle et al., WHO 6th edition review) — yet men are tested last, reversing the order of the cheapest, most informative test. Am Fam Physician 2023 is explicit: semen analysis belongs in the initial assessment.
Why is the lab report the real symptom?
Almost nothing in male infertility can be felt: a man with 4 million sperm per mL can have normal libido, erections and testosterone. The signs are lab values, and two facts about the test matter most:
- One sample is not a diagnosis. Guidelines call for a second sample before labeling anything abnormal: of 367 specialists across 49 countries, 81.7% always require two specimens — PMID 38606865 — and in 3,456 men abstinence interval and repeat testing changed the result — PMID 36908159.
- Thresholds are reference limits, not pass/fail lines. The WHO 6th edition (2021) warns against treating its 5th percentile as a boundary: “normal” proves neither fertility nor infertility.
| Parameter | WHO 6th ed (2021) lower limit | WHO 5th ed (2010) |
|---|---|---|
| Semen volume | 1.4 mL | 1.5 mL |
| Sperm concentration | 16 million/mL | 15 million/mL |
| Total sperm number | 39 million | 39 million |
| Total motility | 42% | 40% |
| Progressive motility | 30% | 32% |
| Normal forms | 4% | 4% |
| Vitality | 54% | 58% |
Which physical signs warrant a specialist’s look?
Some findings are visible or palpable, so evaluation includes a physical exam:
| What you notice | What it can point to | First test |
|---|---|---|
| Soft bag-of-worms mass above a testicle, sometimes a dull ache | Varicocele | Examination; scrotal ultrasound |
| Loss of libido, erectile difficulty, breast tenderness | Low testosterone, raised prolactin, thyroid disease | Testosterone, LH, FSH, prolactin |
| Small, firm testicles; sparse body hair | Klinefelter syndrome or other genetic cause | Karyotype, Y-microdeletion testing |
| Prior chemotherapy, testicular surgery, undescended testis, hernia repair | Testicular failure or obstruction | Semen analysis plus FSH and testosterone |
| Nothing detectable | Obstruction, varicocele or genetic causes | Semen analysis, confirmed twice |
Varicocele is easy to over-read: one series found it in 43.1% of 455 infertile men — Andrologia 2017 — but a 2025 study of 3,632 subfertile men and 276 fathers found 29.5% vs. 27.2% — not significant, the real gap in sperm DNA fragmentation (20.8% vs. 12.3%) — Front Biosci 2025.
What if the cause is hormonal or genetic?
With a very low count or none, evaluation moves to hormones and genetics: Klinefelter syndrome affects roughly 1 in 600 male births, and karyotype is standard when the testes are small and sperm absent — PMID 41110460.
Y-chromosome microdeletions appeared in 3.31% of 4,714 Chinese men evaluated for infertility, rising from 0.17% with normal counts to 7.54% among the most affected — PMID 38053137 — changing both retrieval odds and the risk of passing the deletion to a son; the AUA/ASRM guideline, J Urol 2021 sets how far the workup goes.
When Should You Not Wait 12 Months?
Waiting a full year suits a 30-year-old with regular cycles and no other findings, and is wrong in five guideline-based situations:
- She is 35 or older and you have been trying for 6 months. Evaluate and treat at 6 months, immediately at 40 or older — ACOG 781.
- Cycles longer than 35 days, or no period for three months. Anovulation until proven otherwise — Ann Acad Med Singap 2023.
- A condition already known to damage fertility — endometriosis, PCOS, past chlamydia or pelvic inflammatory disease, ectopic pregnancy, chemotherapy, radiotherapy, undescended testes, prior testicular or hernia surgery.
- An abnormal semen analysis. Repeat it rather than waiting out the 12 months; one low value is a second test, not a verdict.
- Two or more pregnancy losses. Recurrent loss triggers its own workup — chromosome analysis, uterine imaging, metabolic and immunological testing — SOGC Guideline No. 464.
Body weight cuts across all five. In a Rotterdam cohort of 3,033 pregnancy attempts, female obesity lowered per-cycle conception odds (fecundability ratio 0.72, 95% CI 0.63–0.82) and raised the odds of exceeding 12 months (OR 1.67, 1.30–2.13), as did male obesity (OR 1.69, 1.24–2.31); underweight also lengthened time to pregnancy (OR 1.88) — JAMA Netw Open 2024.
What Does the Fertility Workup Involve — and What Does It Cost?
Guidelines converge on a small panel: ACOG says couples should finish with “evidence of ovulation, tubal patency, and a normal semen analysis” — ACOG 781.
| Where the problem may be | Test | What it answers |
|---|---|---|
| Ovulation | Cycle history, mid-luteal progesterone, LH tracking | Is an egg released each month? |
| Ovarian reserve | AMH, FSH with estradiol (day 2–4) | Egg supply left for her age? |
| Hormonal background | TSH, prolactin, testosterone | Thyroid or prolactin interference? |
| Tubes and uterus | HSG or saline-infusion sonography, transvaginal ultrasound | Tubes open, cavity normal? |
| Pelvis | Laparoscopy if endometriosis is suspected | Endometriosis imaging missed? |
| Male partner | Semen analysis, confirmed twice | Count, motility, morphology |
| Male partner, if abnormal | Testosterone, FSH, LH, prolactin, karyotype, Y-microdeletion | Hormonal or genetic cause, and treatment direction |
Cost varies most: one study priced this panel — FSH, LH, estradiol, progesterone, semen analysis, ultrasound, HSG — in the five most populous cities of each US state, from $835 in Oregon to $2,986 in Alaska, Midwest average $1,651; state insurance mandates did not predict price — F S Rep 2024. Ask for a full price list, compare pricing in our hospital directory, or contact our team.
How Do Age and Treatment Change Your Chances?
Age changes the numbers more than anything else. In a North American preconception cohort of 2,962 couples followed up to 12 cycles, per-cycle fecundability fell from the mid-20s, and at 40–45 was 0.40 of the 21–24 baseline (95% CI 0.22–0.73) — Am J Obstet Gynecol 2017.
| Female age | Fecundability ratio vs 21–24 (95% CI) | Cumulative pregnancy |
|---|---|---|
| 25–27 | 0.91 (0.74–1.11) | 79.3% at 12 cycles |
| 28–30 | 0.88 (0.72–1.08) | 62.0% at 6 cycles |
| 31–33 | 0.87 (0.70–1.08) | — |
| 34–36 | 0.82 (0.64–1.05) | — |
| 37–39 | 0.60 (0.44–0.81) | — |
| 40–45 | 0.40 (0.22–0.73) | 27.6% at 6 cycles; 55.5% at 12 cycles |
Treatment changes the arithmetic. In the FASTT randomized trial of 503 couples with unexplained infertility aged 21–39, per-cycle pregnancy rates were 7.6% for clomiphene plus IUI, 9.8% for gonadotropin plus IUI and 30.7% for IVF; skipping gonadotropin-IUI cut median time to pregnancy from 11 months to 8, with average charges per delivery $9,800 lower (95% CI: $25,100 lower to $3,900 higher) — Fertil Steril 2010. That is the warning about “let’s try a few IUIs first”: under half IVF’s per-cycle yield. Our IUI guide and IVF success rate by age guide run it by age band.
Three Patient Stories: PCOS, Azoospermia and Age
Three patients — PCOS, non-obstructive azoospermia, age-related decline with no symptoms — show the workup from the inside.
Patient stories are shared with consent; names and identifying details changed.
Dana, 33 — Portland, Oregon. Cycles of 45 to 60 days, diagnosed with PCOS. Irregular since 19 and told they would “settle down,” she asked for a workup after eight months without conceiving: “I was not in pain. I just didn’t have a rhythm.” Her AMH was 46 pmol/L, above the 37 pmol/L polycystic-morphology threshold, and cycle history plus raised androgens confirmed PCOS; his semen analysis was normal. The panel cost $835, the survey’s lowest total. Letrozole produced ovulation on cycle 3 and a pregnancy that month; her daughter was born 14 months after the first appointment. See our PCOS and IVF guide.
Wei, 38 — San Francisco Bay Area. No sperm on two analyses: non-obstructive azoospermia. His wife’s tests came back normal after a year; only then did his semen analysis find no sperm at all, twice, four weeks apart: small firm testicles, elevated FSH, normal karyotype. “Everyone kept asking my wife what was wrong. Nobody had asked whether I should be tested,” he said. Surgical sperm retrieval (micro-TESE) finds sperm in about 47% of men with non-obstructive azoospermia, at a cumulative live-birth rate near 24% per cycle (95% CI 20–28%) when sperm are found and used for ICSI — 117 studies, 21,404 men. Sperm were retrieved; one of two transferred blastocysts produced a live birth. A 2026 review finds 64% of US men still pay over $15,000 out of pocket — Curr Urol Rep 2026. Our azoospermia guide and male infertility guide cover the detail.
Priya, 41 — Chicago. No symptoms; only the calendar was abnormal. Regular 28-day cycles, no pain, no infection history: six months of trying at 41 is the threshold for evaluating, not waiting. Her AMH was 0.4 ng/mL with elevated FSH, his semen analysis normal — age-related decline in egg number and quality. A Midwest workup averaged $1,651 in the same survey. Two IUI cycles failed — per-cycle yield in unexplained infertility is under 10%, versus 30.7% for IVF in FASTT — and her first cycle produced four eggs whose single euploid blastocyst did not implant. She moved to donor eggs and gave birth at 43; our own-egg vs donor-egg guide and low AMH guide show how that call is made.
How to Plan Your Next Step
Three actions cover what you can do now:
- Test the man first, not last. Semen analysis is cheaper than the female hormone panel and applies to 40–50% of couples; repeat it before calling a result final.
- Measure, don’t estimate. “Regular” was wrong for 10% of the 97,414 women surveyed; cycles over 35 days or absent for three months trigger evaluation.
- Apply the time rules honestly. Under 35: 12 months. 35 or older: 6 months. 40 or older, a known condition, or two prior losses: now.
For the disease behind each sign: male infertility and IVF, endometriosis and IVF, tubal factor infertility, recurrent pregnancy loss, how to choose a clinic.
FAQ
Q: How do I know if I am infertile?
Time-based, not symptom-based: no pregnancy after 12 months of regular unprotected intercourse, or 6 months at 35 or older.
Q: Can you be infertile with no symptoms at all?
Yes, up to 30% of infertile couples are diagnosed with unexplained infertility — normal ovulation, open tubes, a normal semen analysis — and male factor contributes to 40–50% while most of those men feel well.
Q: What are the first signs of infertility in men?
Usually none: the first sign is an abnormal semen analysis, and a second analysis is standard before diagnosis; the WHO 6th edition floors (16 million/mL, 42% total motility) are reference limits, not proof.
Q: My cycles are irregular — does that mean I can’t get pregnant?
No, irregular cycles mean unreliable ovulation, treatable but worth investigating: cycles longer than 35 days or absent periods are the PCOS ovulation-dysfunction marker, and 10–13% of reproductive-age women are affected, up to 70% undiagnosed.
Q: How long should we try before seeing a doctor?
12 months under 35, 6 months at 35 or older, immediately at 40 or older or with a known condition. Fertility declines from about 32, faster after 37, and the 12-cycle cumulative pregnancy rate in 2,962 couples fell from 79.3% at 25–27 to 55.5% at 40–45.
Q: What tests will we have, and what do they cost?
Cycle history and progesterone, AMH and FSH, thyroid and prolactin, HSG or sonography, and semen analysis repeated once if abnormal: the panel ran from $835 in Oregon to $2,986 in Alaska, Midwest average $1,651 — ask for a full price list.
Q: Is period pain a sign of infertility?
Not by itself, but it is the most dismissed route to an endometriosis diagnosis: up to 10% of women, 26% reporting infertility, diagnosis delayed 5 to 12 years, found in about 50% of infertility evaluations; our endometriosis and IVF guide covers staging.
Q: I am 38 and feel completely fine — do we still need testing?
Yes, after 6 months: feeling well says nothing about egg count, tubal patency or sperm, and fecundability relative to 21–24 falls to 0.82 at 34–36, 0.60 at 37–39 and 0.40 at 40–45.
Disclaimer: educational purposes only, not medical advice, diagnosis or treatment. Statistics describe populations, not individuals; guidelines are revised periodically and your clinician’s assessment takes precedence.
Written by the ProIVF Medical Editorial Team and reviewed by the ProIVF Medical Advisory Board, drawing on the ACOG, ASRM and WHO sources linked throughout. ProIVF is a clinic-information platform; we do not provide treatment or accept payment to influence rankings.
Last updated: September 14, 2026.
