Infertility is clinically defined by how long you’ve been trying to conceive without success. If you’re under 35 and have been having regular, unprotected intercourse for 12 months without getting pregnant, that meets the threshold. If you’re 35 or older, that window shortens to 6 months. But certain signs and symptoms can point to a fertility problem well before you hit those timelines.
What Counts as “Trying Long Enough”
Even with perfect timing and no fertility issues at all, your odds of conceiving in any given month are lower than most people expect. At age 25, the chance of natural conception per cycle is about 25%. By 35, it drops below 15%, and by 40, it falls below 5%. This means that even healthy couples can take several months to conceive, and a few months of negative pregnancy tests don’t necessarily signal a problem.
The 12-month and 6-month timelines exist because they account for this natural variability. If you’ve been consistently trying for that long without success, something beyond normal odds is likely at play, and it’s worth investigating. These timelines apply to couples where neither partner has a known medical history that could affect fertility. If either of you does, earlier evaluation makes sense.
Signs of Fertility Problems in Women
The most telling clue is your menstrual cycle. A cycle shorter than 21 days, longer than 35 days, or one that’s highly irregular or absent altogether can mean you’re not ovulating. Without ovulation, pregnancy isn’t possible. Tracking your cycle length over several months gives you useful baseline information before you ever see a doctor.
Polycystic ovary syndrome (PCOS) is one of the most common causes of ovulation problems. It creates a hormone imbalance that can show up as irregular or missing periods, but also as acne, unusual hair growth on the face or body, weight gain, and insulin resistance. If you recognize several of these together, PCOS may be worth investigating.
Endometriosis is another major contributor. It can cause severe menstrual cramps, chronic pelvic pain, and pain during sex. Endometriosis affects fertility in multiple ways: it can create adhesions that physically block the fallopian tubes, disrupt the hormonal signals that trigger ovulation, and interfere with how eggs travel through the reproductive tract. One study found abnormal egg transport in 64% of women with endometriosis, compared to 32% in a control group. A definitive diagnosis typically requires a surgical procedure like laparoscopy, though ultrasound can sometimes identify ovarian cysts caused by the condition.
Signs of Fertility Problems in Men
Male-factor infertility contributes to roughly half of all cases where couples struggle to conceive, yet it’s often overlooked. The physical signs can be subtle. Changes in sexual function are among the most noticeable: difficulty maintaining an erection, problems with ejaculation, unusually low ejaculate volume, or reduced sex drive.
Pain, swelling, or a lump in the testicle area is another signal worth paying attention to. A varicocele, which is a swelling of the veins that drain the testicle, is one of the most common treatable causes of male infertility. You might notice it as a dull ache or a feeling of heaviness.
Hormonal signs can also appear. Decreased facial or body hair, or unexpected breast tissue growth, can point to a hormonal or chromosomal abnormality affecting sperm production. These changes develop gradually, so they’re easy to dismiss.
When to Seek Help Before the Standard Timeline
Several red flags mean you shouldn’t wait a full year (or six months) before talking to a doctor. Seek evaluation sooner if you or your partner has a history of:
- Irregular or absent periods
- Pelvic inflammatory disease
- Ectopic pregnancy
- Repeated miscarriages
- Thyroid problems
- Injury or trauma to the scrotum or testes
- Persistent problems with erections or ejaculation
- Cystic fibrosis
Any of these can directly impair fertility, and waiting out a full timeline only delays answers you could get sooner.
What Fertility Testing Looks Like for Women
A fertility workup for women typically starts with blood tests timed to specific points in your cycle. On day 3 of your period, doctors check hormones that reflect how your ovaries are functioning. One key hormone stimulates follicle growth in the ovaries. Levels under 6 suggest strong ovarian reserve, while levels above 13 indicate the ovaries will be very difficult to stimulate. Another hormone, when elevated above the first, is one indicator of PCOS.
About a week after ovulation, a progesterone blood test confirms whether you actually ovulated that cycle. A level above 10 on an unmedicated cycle is what most doctors look for. A level above 5 suggests some ovulatory activity occurred, but may not be robust enough.
If blood work looks normal, the next step is often a hysterosalpingogram, or HSG. During this test, a contrast dye is injected into your uterus and fallopian tubes while X-rays are taken. If the dye flows freely through the tubes and spills out the ends, they’re open. If it stops, there’s a blockage. The test also reveals structural abnormalities in the uterus, including fibroids, polyps, scar tissue, and unusual uterine shapes that might interfere with implantation. Conditions like endometriosis, prior ectopic pregnancies, and sexually transmitted infections can all cause the kind of tubal blockages an HSG detects.
What Fertility Testing Looks Like for Men
A semen analysis is the cornerstone of male fertility evaluation. It’s a lab test that measures multiple characteristics of a sperm sample. The World Health Organization’s current reference values set the bar at 39 million or more total sperm per ejaculate, at least 42% of sperm moving, and more than 4% with normal shape. Falling below any of these thresholds doesn’t guarantee infertility, but it does flag a potential issue that may need further investigation or treatment.
A full lab analysis also evaluates ejaculate volume, the acidity of the semen, and the percentage of sperm that are alive versus dead. These details matter because fertility depends on more than just sperm count.
Are At-Home Fertility Tests Worth It?
Over-the-counter fertility kits for men have become widely available, but they have real limitations. Some only confirm whether sperm is present at all. More advanced phone-based kits can estimate sperm concentration and motility, but even those capture only a fraction of what a clinical semen analysis reports. They can’t accurately assess sperm shape, semen acidity, ejaculate volume, or the percentage of sperm that are actually alive. A normal result on a home test doesn’t rule out male-factor infertility.
For women, at-home ovulation predictor kits are useful for confirming that you’re getting a hormonal surge before ovulation, which helps with timing. But they can’t tell you whether your ovarian reserve is healthy, whether your tubes are open, or whether conditions like endometriosis or PCOS are present. Think of home tests as a starting point, not a diagnosis. If you’ve been trying for the recommended timeframe without success, or if you have any of the warning signs listed above, clinical testing gives you the complete picture that home kits simply can’t provide.