About one in six people of reproductive age experience infertility at some point, so if you’re wondering whether it applies to you, you’re far from alone. The standard medical benchmark is 12 months of regular, unprotected sex without conceiving if the female partner is under 35, or 6 months if she’s 35 or older. But you don’t have to wait that long to start paying attention to your body. There are signs you can watch for, tests you can try at home, and a clear sequence of clinical evaluations that can give you answers.
Signs That May Point to a Fertility Problem
Some fertility issues produce no obvious symptoms at all, which is why testing matters. But certain physical signs are worth noting because they can signal an underlying condition before you ever visit a specialist.
For women, the biggest clue is your menstrual cycle. Periods that are highly irregular, very far apart, or absent altogether can indicate that you’re not ovulating consistently. Severe pelvic pain during periods may suggest endometriosis, a condition where tissue similar to the uterine lining grows in places it shouldn’t, sometimes affecting the fallopian tubes or ovaries. Excess facial or body hair growth, persistent acne, or unexplained weight gain can point toward polycystic ovary syndrome (PCOS), one of the most common hormonal causes of irregular ovulation.
For men, the signs are subtler. Testicles that are noticeably small or a visible, swollen vein in the scrotum (called a varicocele) can affect sperm quality. Changes in sex drive, difficulty maintaining erections, or shifts in hair growth patterns sometimes reflect hormonal imbalances worth investigating.
What You Can Track at Home
Before booking any appointments, two home methods can help you understand whether you’re ovulating regularly: basal body temperature (BBT) charting and ovulation predictor kits (OPKs).
BBT charting involves taking your temperature every morning before getting out of bed. After ovulation, your resting temperature rises slightly and stays elevated until your next period. The catch is that by the time you see the spike, ovulation has already passed, so it’s more useful for confirming a pattern over several months than for timing a specific cycle. It works best if your cycles are fairly predictable and you don’t mind the daily routine of recording temperatures.
OPKs are urine strips that detect a surge in luteinizing hormone, which triggers ovulation roughly 24 to 36 hours later. They give you a more actionable heads-up, but they’re not foolproof. You can miss the surge if you test at the wrong time of day or if your urine is too dilute. Both methods are most reliable for women with regular cycles. If you have PCOS or other conditions causing irregular periods, ovulation can be difficult to pin down with either approach.
If you track for a few months and see consistent signs of ovulation, that’s reassuring but doesn’t rule out other causes of infertility like blocked fallopian tubes or sperm issues. If you’re not seeing clear ovulation patterns, that’s useful information to bring to a doctor.
How Age Affects Your Timeline
Age is the single biggest factor in female fertility, and understanding the numbers helps you decide how quickly to seek help. Per-cycle fertility rates give a clearer picture than annual statistics. Between ages 30 and 34, about 40% of women conceive per cycle. That drops to 33% between 35 and 39, then to 18% between 40 and 44. After 45, the rate falls to around 5% per cycle.
This decline is why the medical timeline for seeking evaluation is shorter for women 35 and older (6 months instead of 12). Egg quantity and quality both decrease with age, and earlier testing means earlier access to options if something needs to be addressed. Male fertility also declines with age, though more gradually and with greater individual variation.
What Happens at a Fertility Evaluation
A fertility specialist, typically a reproductive endocrinologist, will start with a thorough review of both partners’ medical histories. Expect questions about menstrual cycle regularity, sexual history, prior pregnancies, surgeries, medications, and lifestyle factors. A physical exam and screening for sexually transmitted infections are standard at the first visit. From there, testing branches into three main areas.
Hormone Testing
Blood tests measure hormones that control ovulation and egg supply. The most common are drawn on day 3 of the menstrual cycle. Follicle-stimulating hormone (FSH) tells your ovaries to develop eggs each month; a normal day-3 level falls between 3 and 20 mIU/ml, with higher numbers suggesting the body is working harder to stimulate the ovaries. Luteinizing hormone (LH) is typically below 7 mIU/ml on day 3, then surges above 20 mIU/ml to trigger ovulation mid-cycle. Your doctor may also test anti-Müllerian hormone (AMH), which reflects the remaining egg supply and can be drawn on any day of the cycle. Thyroid hormones and other markers may be checked as well, since even mild thyroid dysfunction can interfere with conception.
Semen Analysis
A semen analysis is one of the first tests ordered because male factor issues account for roughly half of infertility cases, either alone or in combination with female factors. The test evaluates sperm count, how well sperm move (motility), and their shape (morphology). The most recent edition of the World Health Organization’s lab manual actually moved away from strict “normal vs. abnormal” cutoffs, recognizing that fertility decisions depend on the full clinical picture rather than any single number. Your doctor will interpret results in context, sometimes recommending a repeat test since sperm quality can fluctuate.
Structural Imaging
A hysterosalpingogram, commonly called an HSG, is a key test for checking whether the fallopian tubes are open and whether the uterus has an unusual shape. During the procedure, a provider inserts contrast dye into the uterus and takes a series of X-rays. If the dye flows freely through the fallopian tubes and spills out the ends, the tubes are clear. If the dye hits a barrier, that indicates a blockage. The HSG can also reveal uterine fibroids, polyps, adhesions (scar tissue), or structural variations in the shape of the uterus that might affect implantation.
A transvaginal ultrasound is often performed as well, giving the doctor a real-time view of the ovaries and uterus. This is how providers count developing follicles on the ovaries, which is one way to assess ovarian reserve. For PCOS specifically, 20 or more follicles visible on at least one ovary is considered a diagnostic marker.
Common Causes Testing Can Uncover
Ovulation disorders are the most frequent female factor. PCOS leads the list, affecting hormone levels in ways that prevent eggs from maturing and releasing on a regular schedule. Diagnosis usually involves a combination of irregular cycles, signs of excess androgens (like unwanted hair growth or acne), and the characteristic follicle pattern on ultrasound. AMH levels can also serve as an alternative marker in adults.
Blocked or damaged fallopian tubes are another common finding. Pelvic infections, prior surgeries, or endometriosis can cause scarring that prevents the egg and sperm from meeting. Endometriosis itself can be tricky to diagnose through standard imaging alone and sometimes requires a surgical procedure called laparoscopy for confirmation.
On the male side, varicoceles are the most common correctable cause. Low sperm count or poor motility can also result from hormonal imbalances, certain medications, excessive heat exposure, or genetic factors. In some cases, no clear cause is found for either partner, which is classified as unexplained infertility and still has treatment options.
What to Do Before Your Appointment
If you’re planning to see a specialist, a few steps can make your first visit more productive. Start tracking your menstrual cycles now, noting the first day of each period and how long cycles last. Write down any medications or supplements both you and your partner take. Gather records of any prior gynecological procedures, STI history, or relevant surgeries. If you’ve been charting BBT or using OPKs, bring that data along.
Some of the initial tests may happen at the first appointment, while others get scheduled for specific days of your cycle. Expect the evaluation process to take a few weeks to a couple of months before you have a complete picture. Both partners should be evaluated from the start, since roughly half the time a male factor is involved and testing a semen sample is one of the simplest, least invasive steps in the entire process.