Do I need my hormones tested?

By Shweta Arora, MD, board-certified physician · Medically reviewed by Robin Arora, MD · Updated October 2026

It seems logical: if hormones are changing, a hormone test should show it. In perimenopause, though, hormone levels can swing from week to week, so a single result is a snapshot of one moment, not a diagnosis.

The short answer: over 45, your story is the test

For healthy women over 45, national guidelines (including the U.K.’s National Institute for Health and Care Excellence, NICE) diagnose perimenopause from symptoms such as hot flashes and changing periods, and menopause after 12 months without a period, without lab tests.

NICE specifically advises against using estradiol, anti-Müllerian hormone (AMH) or inhibin levels to diagnose perimenopause or menopause in women over 45.

Why one hormone test can’t “catch” perimenopause

• Levels swing. Follicle-stimulating hormone (FSH) and estradiol can change from day to day in perimenopause. A “normal” result on a good week doesn’t rule the transition out.
• Birth control changes the numbers. FSH isn’t reliable while you’re using combined hormonal birth control or high-dose progestogen.
• Results rarely change the plan. Treatment is guided by your symptoms, your health history and your preferences.

Read more about how perimenopause is recognized in our perimenopause guide.

Your calendar is often the best test

Researchers stage the transition by cycle changes, not lab values. Early perimenopause is when the length of your cycles keeps varying by 7 days or more; late perimenopause is when you go 60 days or more without a period. A simple period-tracking app can tell you more than a single blood test.

FSH, one of the first hormones to shift, began rising about six years before the final period in the SWAN study and leveled off about two years after it. Estradiol can stay normal or even spike for much of that time, which is why one result can point the wrong way.

When blood tests are worth it

• You’re under 40 to 45 and your periods have become irregular or stopped. Early or premature menopause needs a proper workup, and NICE advises FSH on two samples taken 4 to 6 weeks apart rather than a single test.
• Heavy, very frequent or unusual bleeding, or any bleeding after 12 months without a period.
• Symptoms that could be something else, such as thyroid problems, high prolactin or pregnancy. See perimenopause or thyroid?
• You’ve had a hysterectomy and the picture is unclear without periods to track.

Saliva, urine and finger-prick hormone kits

Home hormone panels can look precise, but they aren’t recommended for diagnosing menopause. The Menopause Society states that it does not recommend saliva testing to determine hormone levels, and that testing isn’t needed to decide whether a woman has the “right amount” of hormones.

Hormone creams and gels add another problem: hormone left on the skin or fingers can contaminate a sample. In one hospital review of 578 people using testosterone gel, several very high blood results were traced to gel contaminating the draw site.

If you start hormone therapy

For most women, how you feel is the main guide: symptom relief, side effects and bleeding patterns, along with blood pressure and your routine screenings. Blood tests do play a role for some treatments, such as testosterone, where levels are checked to keep you in a safe range. Testosterone for women is considered mainly for low sexual desire, and at Serene it is evaluated and prescribed in person only, never by telehealth.

Already on hormone therapy? When an estrogen level helps

• The same dose works differently in different bodies. Estrogen through the skin, as a patch, gel or spray, is absorbed differently from person to person, so two women on the same prescription can have quite different levels.
• A level can help if you still have bothersome symptoms despite treatment and we want to know whether you’re absorbing it, or if you went through menopause before 40. Changing how estrogen is delivered often helps more than chasing a number, according to the British Menopause Society.
• Timing matters. With gels, the result depends on when you last applied it, so follow the timing instructions you’re given and draw blood from the opposite arm.
• No magic number for bone. Hormone therapy protects bone in a dose-related way, but there’s no proven minimum blood level. In one two-year trial, even a very low-dose estrogen patch improved spine and hip bone density in women aged 60 to 80. Bone density scans, not hormone levels, are how bone health is tracked.

Midlife labs that matter anyway

Even when hormone tests aren’t needed, midlife is a good time to check the numbers that shape your long-term health: blood pressure, cholesterol, blood sugar (A1c) and other screenings based on your history. See midlife weight gain & heart health.

What to bring to your visit

• A 2 to 3 month log of symptoms and periods
• Your medicines and birth control
• Your family history
• Any outside lab results, so we can review them together

Every plan is individualized, and treatment is recommended only when it’s right for you after your consultation.

Related reading: Perimenopause: symptoms, diagnosis and treatment · Is it perimenopause or your thyroid? · Midlife weight gain, blood sugar & your heart. Browse the full Women’s Health Library.

See us in person or by video

Visit our physician-led team at our Hudson, Ohio or Barboursville, West Virginia office, or meet Dr. Robin Arora by telehealth from anywhere in Ohio, West Virginia, Kentucky or Florida.

Sources: NICE guideline NG23, Menopause: diagnosis and management; The Menopause Society, “What is hormone testing?”; Australasian Menopause Society, Diagnosing menopause; Davis et al., Global Consensus Position Statement on Testosterone Therapy for Women, J Clin Endocrinol Metab 2019; Pinedo Pichilingue et al., Heliyon 2023; Harlow et al., STRAW+10, Menopause 2012; Randolph et al., J Clin Endocrinol Metab 2011 (SWAN); British Menopause Society, measurement of serum estradiol (2025); Ettinger et al., Obstet Gynecol 2004. This page is general education, not medical advice.