Fertility testing typically involves a combination of blood work, imaging, and physical exams that evaluate how well your reproductive system is functioning. For women, the core tests check hormone levels, confirm ovulation, and look for structural problems in the uterus and fallopian tubes. For men, the process starts with a semen analysis. Most of these tests can be completed within one or two menstrual cycles.
The American Society for Reproductive Medicine recommends starting a formal evaluation after 12 months of unprotected sex without pregnancy if you’re under 35, or after 6 months if you’re 35 or older. For women over 40, earlier and more immediate testing is warranted.
Hormone Blood Tests for Women
Hormone testing gives your doctor a snapshot of your ovarian function and overall reproductive health. The timing of these blood draws matters because hormone levels shift throughout your menstrual cycle, and drawing blood on the wrong day can produce misleading results.
On day 3 of your period (counting the first day of full bleeding as day 1), blood is drawn to measure three key hormones. Follicle-stimulating hormone (FSH) reflects how hard your brain is working to stimulate your ovaries. Higher-than-expected levels can signal that your ovarian reserve, the supply of eggs you have left, is declining. Luteinizing hormone (LH) helps regulate your cycle length and triggers ovulation. Estradiol, the primary form of estrogen, supports egg development and thickens the uterine lining in preparation for pregnancy. Testing all three together on day 3 gives a baseline picture of how your ovaries are responding at the start of a new cycle.
Your doctor may also test anti-Müllerian hormone (AMH), which is one of the most useful markers of ovarian reserve. Unlike the other hormones, AMH can be drawn on any day of your cycle because it stays relatively stable throughout the month. A low AMH level suggests fewer eggs remain, while a very high level can sometimes point toward polycystic ovary syndrome (PCOS). Thyroid hormone and prolactin levels are often checked at the same time, since abnormalities in either can interfere with ovulation.
Confirming Ovulation
Irregular or absent ovulation is one of the most common causes of difficulty conceiving, so confirming that you’re actually releasing an egg each month is a central part of fertility testing. There are two main approaches, and they answer slightly different questions.
Urine-based ovulation predictor kits detect the surge of LH that happens roughly 12 to 24 hours before an egg is released. These are available over the counter and are useful for timing intercourse, but they predict ovulation rather than confirming it already happened. With five days of testing, there’s about an 80% chance of catching the surge. Ten days of testing raises that to 95%.
A blood test for progesterone, typically drawn around day 21 of your cycle (about a week before your expected period), confirms that ovulation has already occurred. After an egg is released, the empty follicle produces progesterone to prepare the uterine lining for implantation. Elevated progesterone at this point in your cycle is strong evidence that you ovulated. However, it can’t tell you exactly when ovulation happened or predict when it will happen next cycle. If your cycles are longer or shorter than 28 days, your doctor will adjust the timing of this blood draw accordingly.
Checking the Uterus and Fallopian Tubes
Even with healthy eggs and normal hormones, pregnancy can’t happen if the fallopian tubes are blocked or the uterus has structural issues. A hysterosalpingogram (HSG) is the standard imaging test used to evaluate both.
During an HSG, a thin catheter is placed through the cervix, and contrast dye is slowly injected into the uterus. A series of X-rays are taken as the dye fills the uterine cavity and moves into the fallopian tubes. If the tubes are open, the dye flows through and spills out the far ends. If the dye hits a barrier and stops, that tube is blocked. The whole procedure takes about 15 to 30 minutes and is done in a radiology suite, not an operating room.
Blockages can result from prior pelvic infections, endometriosis, scar tissue from previous surgery, or a past ectopic pregnancy. The HSG also reveals the shape of the uterine cavity itself. Some women have structural variations they were born with, such as a uterus divided by a wall of tissue (septate uterus) or a uterus with two horn-shaped halves (bicornuate uterus). These variations don’t always cause problems, but they can affect implantation or increase miscarriage risk. The test can also pick up fibroids, polyps, and internal scar tissue (adhesions) that might interfere with conception.
Many women experience moderate cramping during and shortly after the procedure. Taking an over-the-counter pain reliever beforehand can help. Some light spotting afterward is normal.
Ultrasound and Antral Follicle Count
A transvaginal ultrasound is often performed early in the cycle, sometimes on the same visit as your day 3 blood work. The ultrasound allows your doctor to visually assess the ovaries and uterus. One of the most informative measurements is the antral follicle count: the number of small, fluid-filled sacs visible on each ovary. Each of these follicles contains an immature egg. A higher count generally suggests a larger remaining egg supply, while a lower count may indicate diminished ovarian reserve. Combined with your AMH level, this gives a fairly reliable picture of where you stand.
The ultrasound also checks for ovarian cysts, fibroids, polyps, and any visible abnormalities in the uterine lining. It’s painless, takes about 10 minutes, and requires no special preparation.
Semen Analysis for Men
Male factor issues contribute to roughly half of all cases of infertility, so testing both partners from the start saves time. A semen analysis is the first and most important test. It evaluates sperm count (how many sperm are present), motility (how well they swim), and morphology (whether they’re shaped normally). The sample is typically collected through ejaculation into a sterile cup, either at a clinic or at home if it can be delivered within an hour.
Your doctor will usually ask for two to five days of abstinence before the test, since too little or too much time between ejaculations can skew the results. If the first analysis comes back abnormal, a second test is typically ordered a few weeks later to confirm, since sperm quality can vary from sample to sample.
In specific situations, such as recurrent pregnancy loss with no clear explanation, a doctor may order sperm DNA fragmentation testing, which looks at damage to the genetic material inside sperm cells. This is not part of routine screening and is reserved for cases where standard results don’t explain the problem.
What to Expect From the Process
A full fertility workup for both partners can usually be completed within one to two menstrual cycles. The blood work and semen analysis results come back within a few days. An HSG is typically scheduled between days 7 and 12 of your cycle, after your period has stopped but before ovulation. Your doctor coordinates these tests around your cycle, so some scheduling flexibility is needed.
Some tests require specific preparation. For hormone blood draws, you’ll need to know when your period starts so you can schedule the appointment on the correct day. For the semen analysis, abstinence timing matters. For the HSG, you’ll be asked to confirm you’re not pregnant, and some clinics prescribe a short course of antibiotics as a precaution.
Not every person needs every test. Your doctor will tailor the workup based on your age, medical history, cycle regularity, and how long you’ve been trying. If you have known risk factors like a history of pelvic surgery, irregular periods, or a prior sexually transmitted infection, certain tests may be prioritized or added. The goal is to identify the most likely barrier to conception as efficiently as possible, so treatment can be targeted rather than guesswork.