Fertility testing starts with simple blood work and tracking methods you can begin at home, then moves to clinical tests if needed. The process differs for women and men, but in both cases, the goal is the same: identify whether eggs, sperm, hormones, and reproductive anatomy are functioning well enough for conception. Most people don’t need every test available. Your age, how long you’ve been trying, and your medical history determine where to start.
When Testing Makes Sense
The American Society for Reproductive Medicine recommends starting a formal fertility evaluation after 12 months of unprotected sex without pregnancy if you’re under 35, or after 6 months if you’re 35 or older. If you’re over 40, earlier evaluation is reasonable. These timelines shift if you already know about a condition linked to infertility, such as endometriosis, PCOS, irregular periods, or a history of pelvic surgery. In those cases, testing right away makes sense regardless of age.
That said, nothing stops you from gathering information sooner. Several of the tests below, especially hormone panels and semen analysis, are straightforward enough that many people pursue them proactively, even before they start trying.
What You Can Track at Home
Before any lab work, your own body offers useful data. Ovulation predictor kits (OPKs) detect the surge of luteinizing hormone in urine that happens roughly 24 to 36 hours before ovulation. They’re widely available at pharmacies and give you a quick read on whether you’re ovulating at all and when your fertile window falls.
Basal body temperature charting is another option. Your resting temperature rises slightly after ovulation due to progesterone. Tracking it daily with a sensitive thermometer can confirm that ovulation occurred, though research comparing methods has found temperature shifts are less reliable than other indicators like cervical mucus changes or ultrasound. Cervical mucus scoring, which tracks changes in the consistency and stretchiness of vaginal discharge throughout your cycle, has been shown to be a reliable indicator of follicle development and egg release. Combining OPKs, temperature, and mucus observations over two or three cycles gives you a reasonable picture of whether and when you’re ovulating.
For men, home sperm test kits are available over the counter. These are FDA-cleared to screen sperm concentration, flagging results as low or normal based on a threshold of about 20 million sperm per milliliter. The catch is significant: home kits cannot evaluate motility (whether sperm are actually swimming), ejaculate volume, or total motile count. A man could get a “normal” reading while having a serious motility problem. Home kits are a reasonable first screen, but they’re not a substitute for a full semen analysis.
Blood Tests for Ovarian Reserve
The most informative fertility blood work for women centers on ovarian reserve, a measure of how many eggs remain and how well the ovaries are responding to hormonal signals. Most of these tests need to be drawn on day 3 of your menstrual cycle (counting the first day of your period as day 1). Timing matters because hormone levels fluctuate throughout the month, and day 3 values give the clearest baseline.
AMH (Anti-Müllerian Hormone)
AMH is produced by the small follicles in your ovaries where eggs mature. It’s the single best blood marker for estimating how many eggs you have left. Unlike most fertility hormones, AMH can be drawn on any day of your cycle. Average levels fall between 1.0 and 3.0 ng/mL. Below 1.0 is considered low, and below 0.4 is severely low. To put those numbers in context: a typical 25-year-old sits around 3.0 ng/mL, a 30-year-old around 2.5, a 35-year-old around 1.5, and a 40-year-old around 1.0. By 45, levels drop to roughly 0.5 ng/mL. A low AMH doesn’t mean you can’t conceive, but it does suggest fewer eggs are available, which affects both natural conception odds and how you’d respond to fertility treatments.
FSH (Follicle-Stimulating Hormone)
FSH is the hormone your brain sends to your ovaries to recruit an egg each cycle. Drawn on day 3, it reflects how hard your body is working to stimulate the ovaries. When ovarian reserve is declining, FSH levels rise because the brain has to push harder. High day-3 FSH is a red flag for diminished reserve. It’s often ordered alongside estradiol, because elevated estradiol on day 3 can artificially suppress FSH and mask a problem.
Other Day-3 Hormones
Depending on your symptoms and history, your provider may also check LH, prolactin, thyroid hormones (TSH, T3, T4), testosterone, and DHEAS on day 3. LH levels help identify hormonal imbalances associated with PCOS. Thyroid hormones matter because both overactive and underactive thyroid function can disrupt ovulation. Elevated testosterone or DHEAS can point to androgen-driven ovulation problems.
Progesterone (Luteal Phase)
One key hormone is tested later in your cycle, not on day 3. Progesterone is drawn about seven days after ovulation (often called “day 21” testing, though the exact day depends on when you ovulate). After an egg is released, the empty follicle transforms into a structure that produces progesterone. A healthy progesterone level at this point confirms that ovulation actually happened and that your body is producing enough of this hormone to support early pregnancy.
Semen Analysis
A full semen analysis is the cornerstone of male fertility testing and should happen early in any evaluation. Male factors contribute to roughly half of all fertility problems, yet men’s testing is often delayed. The test involves collecting a sample, typically after two to five days of abstinence, and having it analyzed in a lab.
The World Health Organization’s 2021 reference values set the lower limits of normal: a semen volume of at least 1.4 mL, sperm concentration of 16 million per mL, total motility of 42%, and progressive motility (sperm swimming forward effectively) of 30%. Falling below any of these thresholds doesn’t guarantee infertility, but it signals that sperm quality could be a contributing factor. If results are abnormal, a repeat analysis is usually done a few weeks later since sperm production fluctuates. Further evaluation with a urologist may follow.
Imaging Tests for Uterus and Tubes
Blood work tells you about hormones and egg supply. Imaging tells you about the physical pathway an egg and embryo need to travel. Two common procedures check whether the fallopian tubes are open and the uterine lining is normal.
HSG (Hysterosalpingogram)
During an HSG, a thin catheter is placed through the cervix, and dye is injected into the uterus while X-rays are taken. The images show the dye moving through the uterus, into the fallopian tubes, and spilling out the ends. If dye flows freely, the tubes are open. If it stops, there’s a blockage. The HSG also reveals fibroids, polyps, or scar tissue inside the uterus that could interfere with implantation. The procedure takes about 10 to 15 minutes. Most women describe it as a cramping sensation, similar to strong period cramps, that fades quickly after.
Sonohysterogram (SHG)
A sonohysterogram works on a similar principle but uses saline (salt water) and ultrasound instead of dye and X-rays. Saline is injected through a catheter into the uterus while a vaginal ultrasound provides a detailed view of the uterine lining. This makes it especially good at identifying polyps, fibroids, or scar tissue. To check the tubes, a variation called FemVue injects tiny bubbles through the catheter. If the bubbles spill out the ends of the tubes on ultrasound, the tubes are open. Your doctor may recommend one test over the other depending on what they’re most concerned about, though both evaluate the uterus and can assess tubal patency.
Putting Results Together
No single fertility test gives you a complete answer. AMH and FSH tell you about egg quantity, not egg quality, which is primarily determined by age. A semen analysis captures a snapshot that can vary from month to month. Open fallopian tubes don’t guarantee they’re functioning well enough to pick up an egg. Fertility testing is about assembling a picture from multiple data points and identifying any obvious barriers to conception.
For many people, all results come back normal. This is called unexplained infertility, and it accounts for a significant portion of cases. Normal results don’t mean nothing is wrong. They mean the standard tests haven’t found a specific cause, which still helps guide next steps. If you’re starting this process, the most efficient approach is to run blood work, a semen analysis, and an imaging study in parallel rather than sequentially. That way, you have a full picture within one menstrual cycle rather than stretching the evaluation over several months.