Signs of Infertility in Men and Women (and Signs of High Fertility)

What Are the Signs of Infertility?

The primary indicator is time. ASRM recommends an evaluation after 12 months of regular, unprotected intercourse if the female partner is under 35, and after 6 months if she is 35 or older. Nothing else is required to justify getting checked.

That framing matters because most people expect a symptom, and infertility rarely provides one. Neither partner typically feels different. Cycles can be perfectly regular, sex can be entirely normal, and a serious underlying cause can still be present.

Secondary infertility, difficulty conceiving after having previously had a child, works the same way and is just as common a reason for evaluation. A prior pregnancy does not rule anything out, and the same 12-month and 6-month thresholds apply.

Read More: Fertility: Symptoms, Causes, Diagnosis, and Treatment

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Signs of Infertility in Women

Where signs do appear, they usually reflect an underlying condition rather than infertility itself:

• Irregular, absent, or very short cycles are the most useful signal because they suggest ovulation isn't happening reliably. Cycles shorter than 21 days or longer than 35 warrant attention. Polycystic ovary syndrome commonly presents this way, often alongside acne, excess hair growth, or difficulty with weight.

• Endometriosis tends to announce itself differently, through painful periods, pelvic pain between periods, or pain during sex. Because it can also be silent, it is frequently diagnosed only during a fertility workup.

• Pelvic inflammatory disease is worth flagging to your clinician even if it was years ago and treated. PID, most often following an untreated chlamydia or gonorrhea infection, can scar the fallopian tubes, and tubal factors account for roughly a quarter of infertility cases.

• Age remains the single strongest predictor for women, with a gradual decline through the thirties and a sharper one after 35.

Signs of Infertility in Men

Male factor contributes to roughly a third of cases and almost never produces symptoms. Semen looks and feels the same whether the count is normal or near zero, which is why a semen analysis is the only reliable way to know. A few signs do point somewhere:

• Varicocele is the most common correctable cause, and can present as a dull ache or a visible enlargement of the veins in the scrotum, often described as feeling like a bag of worms.

• Difficulty with ejaculation, reduced ejaculate volume, or a marked drop in libido can indicate a hormonal problem.

• Testicular pain, swelling, or a history of undescended testicles all warrant evaluation.

• Testosterone replacement and anabolic steroids suppress the pituitary signals that drive sperm production and can reduce a count to zero. If you are taking either and hoping to conceive, raise it with your prescriber rather than stopping on your own.

What Are the Signs of High Fertility?

This is a popular search, and it deserves an honest answer: no set of outward signs indicates above-average fertility. The signals people point to identify the fertile window within a cycle, not overall reproductive capacity.

Clear, stretchy cervical mucus, a small rise in basal body temperature after ovulation, and a positive ovulation predictor test all mean the same thing: ovulation is near or has just occurred. Regular cycles are a genuinely good sign that ovulation is happening.

But no home observation predicts how easily you will conceive, and ASRM notes that even clinical ovarian reserve tests are poor predictors of natural conception.

The practical use of those signals is timing. Sperm survive up to five days in the reproductive tract while an egg survives about a day, so the highest-probability window is the five days before ovulation through the day of it.

Does Birth Control Cause Infertility?

No, this is the most common fertility fear among contraceptive users, and the evidence is consistent: hormonal contraception does not damage long-term fertility, regardless of how long it was used. What varies is how quickly cycles resume. With pills, the patch, the ring, and IUDs, ovulation typically returns within the first cycle or two after stopping.

The contraceptive injection is the one real exception. Return to ovulation after Depo-Provera takes a median of about 10 months from the last injection, and the prescribing information reports that 83% of users conceive within 15 months and 93% within 18 months. That is a delay, not damage, and pooled data show conception rates converging with the general population regardless of the method previously used.

Emergency contraception raises the same worry and has the same answer. A systematic review of levonorgestrel emergency contraception found no effect on subsequent menstrual cycles, no increase in miscarriage, and conception rates comparable to controls. Repeated use does not change that, though it is not intended as a primary method.

If you are stopping contraception in order to conceive, our companion article on [INVICTUS URL: Stopping Birth Control article] covers what to expect from your cycle in the months afterward. For the full range of contraceptive options, see our women's health conditions page.

Where to Start

If you have passed the 12-month mark, or 6 months if you are 35 or older, the next step is an evaluation rather than more waiting. Do not wait at all if periods are irregular or absent, if there is a history of pelvic infection or endometriosis, or if either partner has a known reproductive condition. Assess both partners at the same time.

Most of the signs above have a treatment once a workup confirms the cause.

• Irregular or absent cycles caused by an ovulation disorder are usually treated first with Clomiphene Citrate (Clomid), an oral medication that prompts the ovaries to release an egg. It is effective for many people, although letrozole is now generally preferred as the first-line option for ovulation induction in PCOS.

• Fallopian tubes scarred by past pelvic infection generally lead to IVF, which bypasses them entirely.

• Endometriosis is managed according to severity, ranging from surgical treatment to ovulation induction with insemination to IVF.

• A suppressed sperm count from testosterone or anabolic steroids often recovers after stopping under supervision, and the same oral medication is sometimes prescribed off-label for men to restore the hormonal signals that drive sperm production.

Where IVF is the route, the protocol medications include Ganirelix Acetate (Fyremadel), Estradiol (Estrace), and Progesterone (Prometrium).

Read More: Fertility: Symptoms, Causes, Diagnosis, and Treatment

Read More: Hormonal Health and Women's Health: Symptoms, Causes, Diagnosis, and Treatment

Read More: Men's Health Conditions: BPH, Erectile Dysfunction, and Hair Loss