Trying to Conceive? Common Fertility Tests Explained

Learn about fertility-related hormone tests, ovarian reserve testing, thyroid screening, and other evaluations commonly discussed during fertility workups.

Fertility testing gives context

Trying to conceive can bring a lot of questions: Am I ovulating? Are my hormones in range? Is my thyroid affecting my cycle? Are there signs that I should see a specialist sooner?

Lab tests cannot guarantee fertility or predict exactly when pregnancy will happen, but they can provide useful information for planning and for conversations with your doctor.

Hormone and ovarian reserve tests

Commonly discussed tests include AMH, FSH, LH, estradiol, progesterone, prolactin, and thyroid tests. AMH is often used as one marker of ovarian reserve, while progesterone may help confirm whether ovulation likely occurred in a cycle.

Some tests are cycle-day specific. For example, certain hormones are commonly checked early in the cycle, while progesterone is often checked after ovulation. Follow the timing guidance for your package.

Other screening that may matter

Depending on your history, doctors may also request blood sugar testing, CBC, vitamin D, infectious disease screening, STI testing, or tests related to sperm health for a partner. Fertility is a shared picture, not only one person's lab results.

If cycles are irregular, PCOS, thyroid changes, high prolactin, or other hormone concerns may be part of the evaluation.

When to start

Many couples are advised to seek evaluation after 12 months of trying, or after 6 months if the person trying to conceive is 35 or older. Earlier testing may be reasonable if periods are irregular, there is known endometriosis, prior pelvic infection, repeated miscarriage, or a known male-factor concern.

A fertility screening package can be a helpful first step if you want organized results before a clinic visit.

What fertility labs can and cannot tell you

Fertility testing can give clues about ovulation, ovarian reserve, thyroid function, prolactin, and other hormone signals. It cannot guarantee whether or when pregnancy will happen.

The best use of fertility labs is to identify patterns, spot issues that deserve follow-up, and help your doctor decide whether additional testing or referral is appropriate.

Timing matters for fertility tests

Some hormones are commonly checked early in the menstrual cycle, while progesterone is often checked about a week after ovulation. If cycles are irregular, timing may need to be individualized.

AMH is less cycle-day dependent than many other fertility markers, but it still needs interpretation with age, symptoms, and clinical context.

Do not forget partner testing

If pregnancy is not happening after months of trying, semen analysis or male-factor evaluation may be part of the workup. Fertility is not only a women's health issue.

A more complete plan may include hormone testing, ovulation tracking, ultrasound, infectious disease screening, and partner assessment depending on the couple's history.

Frequently asked questions

Does AMH tell me if I can get pregnant?

AMH is one marker related to ovarian reserve. It does not by itself predict natural pregnancy or guarantee fertility.

When should progesterone be tested?

Progesterone is usually most useful after ovulation, often around seven days before the expected period. Timing depends on cycle length.

When should we see a fertility specialist?

Common guidance is after 12 months of trying, or after 6 months if age 35 or older. Earlier evaluation may be reasonable with irregular cycles or known reproductive concerns.

Lab tests are educational tools and do not replace medical evaluation. If you have severe, sudden, or worsening symptoms, seek medical care promptly.