Home hormone tests can answer some questions, but the “egg timer” test can’t

Key takeaways

• In a 2017 NIH-funded study of 750 women ages 30 to 44, those with very low AMH, the hormone behind the “egg timer” test, got pregnant within a year about as often as women with normal levels.
• The American Society for Reproductive Medicine says AMH and similar egg-supply tests shouldn’t be used as a fertility test for women who aren’t infertile, or to promote egg freezing.
• The FDA says home ovulation and menopause tests detect their hormone about 9 times in 10, yet neither one can tell you it’s safe to skip birth control.
• In a recall the FDA posted in February 2026, a manufacturer pulled 1,000 menopause test cassettes that had been distributed in the U.S. without the required FDA clearance.
• Before you buy a kit, ask what decision its result would change; if you can’t name one, a clinician-ordered test or your own symptom record may serve you better.

In 2008, researchers in North Carolina began enrolling women ages 30 to 44 who had been trying to get pregnant for three months or less. None had a history of infertility¹.

The women gave blood and urine samples. The team measured anti-Müllerian hormone, or AMH, a marker that roughly tracks how many eggs remain in the ovaries¹³. Then they waited to see who conceived.

Among the 750 women with results, those with very low AMH were no less likely to get pregnant within a year than those with normal levels. Of the low-AMH group, 84% conceived by 12 cycles, compared with 75% of women with normal levels, a difference that wasn’t statistically significant¹.

That study appeared in JAMA in 2017. AMH tests are now sold straight to consumers, sometimes as the “egg timer” test⁴. Other mail-in and drugstore kits promise answers about menopause, thyroid and testosterone²¹¹¹⁴.

Some of these tests do one narrow job very well. Others measure a real hormone that can’t answer the question you bought the kit to ask. This guide sorts them.

A low “egg timer” result didn’t mean fewer pregnancies

The North Carolina study, with Anne Steiner of the University of North Carolina at Chapel Hill as first author and funding from the National Institutes of Health, tested several hormones at once¹². None of them sorted fertile women from less fertile ones.

Women with high follicle-stimulating hormone (FSH) in their blood, another sign of a shrinking egg supply, conceived at about the same rate as everyone else¹. So did women with high FSH in their urine, the kind of measurement home menopause sticks use: 70% conceived within a year, versus 76% of women with normal urine FSH¹.

The authors concluded that their results don’t support using AMH or FSH, from blood or urine, to judge natural fertility in women like those they studied¹.

The American Society for Reproductive Medicine (ASRM), the main U.S. fertility specialists’ group, reached a similar view in a 2020 committee opinion³. It says these egg-supply markers reflect the number of eggs, not their quality³.

Their best use is narrow: predicting how many eggs a woman’s ovaries will release in response to fertility drugs during IVF³. They’re weak predictors of a woman’s chances of getting pregnant on her own³.

So ASRM’s committee advised against using them as a fertility test for women who aren’t infertile, and against using them to promote planned egg freezing³. Age and personal plans, it said, predict reproductive success better³. Our article on fertility myths covers egg freezing odds in detail.

The sales pitch promised more than the hormone could deliver

In 2023, researchers from the University of Sydney and Monash University in Australia reviewed 27 websites in seven countries that sold AMH tests directly to consumers. Their analysis appeared in JAMA Network Open⁴.

About three-quarters of the sites said the test could reveal something about fertility or the chance of conceiving⁴. Most claimed it could signal when menopause would begin or flag a risk of early menopause, estimates the university’s release called unreliable⁴. Fewer than half mentioned the test’s limits⁴.

Only 5 of the 27 sites offered a talk with a physician after the result came back⁴. By our math, that’s fewer than 1 in 5. Two of the authors held fellowships from Australia’s National Health and Medical Research Council, a government funder⁴.

A separate trial asked what that marketing does to people. In late 2022, Tessa Copp of the University of Sydney and her colleagues ran an online experiment with women ages 25 to 40 in Australia and the Netherlands, analyzing results from 967⁵. None had given birth, all wanted children someday, and none had ever had an AMH test⁵.

Each woman was randomly assigned to read one of two pamphlets. One was built from an Australian website selling the test, and the other was an evidence-based pamphlet built with input from women, family doctors and gynecologists⁵. On a 7-point scale of interest in testing, the sales-based group averaged 4.93 and the evidence-based group 3.87⁵.

The evidence-based group understood the test better and valued it less⁵. The women who read the sales copy rated it trustworthy and balanced⁵. That’s the core problem: persuasive material can feel like neutral information.

Pregnancy and ovulation sticks do one job well

The drugstore pregnancy test is a quiet success story.

It detects hCG, a hormone the placenta makes once an embryo implants in the uterus, and gives a yes-or-no answer⁶. In a 28-day cycle, hCG shows up in urine 12 to 15 days after ovulation⁶. The FDA notes that 10 to 20 of every 100 pregnant women won’t get a positive on the first day of a missed period⁶. By our math, that’s 1 or 2 in 10.

So the FDA calls a negative result tentative. Testing again a few days later, or using first-morning urine, can help, and a clinician can order a blood test⁶.

Before one early pregnancy test reached store shelves, the FDA “cleared” it. Clearance means the agency reviewed data showing a new test performs like similar tests already sold⁷. For that product, the maker’s data showed that ordinary users read results the same way trained technicians did in all 295 women tested⁸. That’s company data, but the FDA reviewed it first.

Ovulation sticks are similar. They detect luteinizing hormone (LH), which surges about 1 to 1.5 days before an egg is released, and the FDA says they catch it about 9 times out of 10 when used carefully⁹.

The stick spots the hormone surge that comes before ovulation, and the FDA says it isn’t reliable for preventing pregnancy⁹. Our fertility awareness article explains how to use these kits when you’re trying to conceive.

Saliva ovulation kits, which look for a fern-like pattern in dried saliva, are shakier. The FDA warns that not every woman forms the pattern, that it can appear outside the fertile days, and that eating, drinking, smoking or brushing your teeth can throw off the result¹⁰.

A menopause stick reads one hormone on one morning

Home menopause tests check urine for FSH, a pituitary hormone that climbs when the ovaries stop working¹¹. The FDA says they detect raised FSH about 9 times in 10¹¹. But a raised FSH level isn’t the same thing as a diagnosis.

The FDA says the test doesn’t detect menopause or perimenopause, and you can still get pregnant during the transition¹¹. It also advises against stopping birth control based on the result, because the tests aren’t foolproof¹¹.

Results can shift with whether you used first-morning urine, how much water you drank, and whether you take, or recently stopped, birth control pills or patches, hormone therapy or estrogen supplements¹¹. A negative result doesn’t prove you haven’t reached menopause¹¹.

England’s National Institute for Health and Care Excellence (NICE) leaves little room for a single stick either. Its menopause guideline, updated in 2024, says otherwise healthy women over 45 with typical symptoms can be diagnosed without any lab test at all¹².

At the other end, when early menopause is suspected in a woman under 40, NICE looks for raised FSH on two blood samples taken 4 to 6 weeks apart¹². A one-morning urine reading fits neither path. Our perimenopause article covers NICE’s full testing advice and why that stage’s hormone swings defeat single tests.

Quality is a separate worry. In November 2025, a Chinese manufacturer began recalling 1,000 menopause test cassettes distributed in the U.S. before they had the FDA clearance needed to be legally marketed¹³. The recall notice warned that the tests might give lay users false or inaccurate results¹³.

Finger-prick panels: the tube can matter as much as the lab

Mail-in kits work differently. You prick a finger, fill a small tube, and mail it to a lab that reports actual numbers.

How well that works depends on the hormone. A 2026 study tested finger-prick samples from 39 women, 26 of whom also gave an arm-vein sample at the same clinic visit¹⁴. Thyroid-stimulating hormone (TSH) and free T4, the two main thyroid screening tests, came out within about 3% of the vein results on average¹⁴.

Sex hormones fared worse. The authors reported that in earlier validation work, the same gel-filled tubes gave estradiol readings about 13% low and testosterone about 9% low in home-collected samples, which they blamed on the gel¹⁴.

Read that study with care. Hertility Health, a British company that sells home hormone tests, paid for it, and five of its six authors work with the company or a diagnostics firm¹⁴. The study was small, most participants had normal thyroids, and the authors said lab agreement doesn’t prove a test works as well in real care¹⁴. Still, they published the weak spot.

Timing and sample type matter too. Our articles on hormone rhythms, testosterone and thyroid tests explain why a random-hour sample can mislead. Saliva “balance” panels, saliva cortisol and “adrenal” panels get their own verdicts in our articles on balancing-hormone claims, cortisol and adrenal fatigue claims.

The home hormone test sorter

Our own tool, built from this article’s sources. Start with your question, not the test.

Test	What it measures	Can it answer your question?	What to do instead
Urine pregnancy stick	hCG, yes or no6	Yes, “Am I pregnant?” if timed right; early negatives can be wrong6	Retest in a few days; ask about a blood test if unsure6
Urine LH ovulation stick	LH surge, yes or no9	Yes, “When is my fertile time?” No, “Is it safe to skip contraception?”9	For birth control, see our fertility awareness article
Saliva ferning kit	A fern pattern as estrogen rises10	Often not; not every woman ferns clearly10	Urine LH sticks or charting body signs
AMH “egg timer” kit	A rough count of remaining eggs3	No, “Can I get pregnant?” or “Can I wait?”13	Weigh your age and plans, which ASRM says predict more3
Urine FSH menopause stick	Raised FSH, yes or no11	No, “Am I in menopause?” or “Can I stop birth control?”11	Over 45, your symptom and period record; under 45, clinician testing12
Finger-prick thyroid panel	TSH and free T4 numbers14	Maybe, as a first look; evidence is early14	A clinician-ordered TSH; see our thyroid article
Finger-prick testosterone or estradiol	Hormone numbers in a home tube14	Not reliably yet; validation work found low readings14	Morning blood draws ordered by a clinician; see our testosterone article

What “cleared,” a lab and an app can and can’t promise

“FDA-cleared” means the agency reviewed data showing a test performs like ones already sold, and “approved” is a higher bar for new or riskier tests⁷. Neither word means the test answers every question printed on the box.

The FDA’s consumer pages cover home urine sticks for pregnancy, ovulation and menopause⁶⁹¹¹. For a mail-in kit, ask the seller whether the FDA has cleared or authorized it, which certified lab runs your sample, and whether a clinician will review the result with you.

Our article on biological-age tests explains how a federal effort to review lab-built tests came and went. Our article on companies that read your labs and sell the fix covers the business model.

Hormone results can reveal pregnancy, fertility plans or a medical condition, and our health app privacy guide shows how to limit who sees them.

Watch for the upsell, too. A result that arrives bundled with a supplement or a prescription offer deserves a second opinion. Our testosterone article describes online clinics that offered hormones to a man whose level was normal.

There’s a natural-health lesson hidden in the NICE guideline. For otherwise healthy women over 45, it treats your own record of hot flashes and period changes as the diagnosis, no kit required¹². Knowing your body, and writing it down, is a test in its own right.

How strong is the evidence?

Use	Evidence level	Why
Home pregnancy test after a missed period	Strong evidence	FDA-cleared; detects hCG reliably once enough has built up68
LH sticks to detect the hormone surge before ovulation	Strong evidence	Catch the LH surge about 9 times in 109
LH or saliva tests to prevent pregnancy	Evidence says no, or unsafe	The FDA says they aren’t reliable for it910
AMH to predict egg yield during IVF	Strong evidence	ASRM’s best-supported use for the test3
AMH or FSH to predict natural fertility	Evidence says no, or unsafe	No link to conception in a 750-woman study; ASRM advises against13
Urine FSH stick to confirm menopause or stop contraception	Evidence says no, or unsafe	The FDA says it can’t detect menopause; NICE uses symptoms after 45 and repeat blood tests under 401112
Finger-prick TSH and free T4 mailed to a lab	Promising but early	Close match in one small, company-funded study14
Finger-prick testosterone or estradiol in gel tubes	Not enough evidence	Read 9% to 13% low in validation work14

When a clinician-ordered test is the better choice

These situations call for a clinician:

• You’re under 40 and your periods have stopped or you have menopause symptoms. NICE’s route to that diagnosis runs through repeat FSH blood tests, which a clinician orders¹².
• Your home menopause test is positive, or you have symptoms whatever it says. The FDA advises seeing a doctor in both cases¹¹.
• Your pregnancy test is negative but your period still hasn’t come. Retest after several days, and ask about a blood test⁶.
• You’ve used a menopause cassette and wonder if it was recalled. Check the FDA notice; the recall told customers to destroy unused tests and retest¹³.

If a home test gave a result that you think was wrong and it affected your care, you can report it to MedWatch, the FDA program that takes reports on medical devices online, by phone or by mail¹⁵. Keep the box and lot number. If you’ve been trying to conceive, our fertility myths article covers when to seek an evaluation, for both partners.

Questions readers ask

The bottom line

The best home hormone tests answer a narrow, well-timed question: Am I pregnant? Is my LH surging? They do that job well, and the FDA has checked their data.

The trouble starts when a kit sells a bigger answer than its hormone holds. A low AMH didn’t mean fewer pregnancies, and a raised FSH stick can’t confirm menopause or protect you from pregnancy. Pick the question first, then the test, and bring surprising results to a clinician.

Related reading

• Fertility beliefs put to the test, starting with the fact that men play a part in about half of couples’ struggles
• Charting your cycle can prevent or plan pregnancy, and the method makes the difference
• Real hormone problems have names and tests, which “balance your hormones” claims lack
• When the company reading your labs also sells the fix
• Thyroid hormone once hid in hamburger meat, and some supplements hide it now

Sources

1. Steiner AZ, Pritchard D, Stanczyk FZ, et al. “Association Between Biomarkers of Ovarian Reserve and Infertility Among Older Women of Reproductive Age.” JAMA, 2017;318(14):1367-1376 (CDC Stacks record with abstract). stacks.cdc.gov
2. Eunice Kennedy Shriver National Institute of Child Health and Human Development. “Ovarian reserve tests fail to predict fertility, NIH-funded study suggests.” News release, October 10, 2017. nichd.nih.gov
3. Practice Committee of the American Society for Reproductive Medicine. “Testing and interpreting measures of ovarian reserve: a committee opinion.” Fertility and Sterility, 2020;114:1151-7. pubmed.ncbi.nlm.nih.gov
4. University of Sydney. “At-home fertility tests probably not trustworthy” (news release on Johnson A, Thompson R, et al., JAMA Network Open, 2023, doi:10.1001/jamanetworkopen.2023.30192). Scimex, August 2023. scimex.org
5. European Society of Human Reproduction and Embryology. “Evidence-based information combats misleading and false claims on the internet and social media about the anti-Mullerian hormone test” (news release on Copp T, et al., Human Reproduction, 2024, doi:10.1093/humrep/deae147). July 29, 2024. eshre.eu
6. U.S. Food and Drug Administration. “Pregnancy” (home use tests). Content current as of April 29, 2019. fda.gov
7. U.S. Food and Drug Administration. “Home Use Tests: Glossary.” Accessed October 2026. fda.gov
8. U.S. Food and Drug Administration. 510(k) decision summary K213379, Clearblue Early Pregnancy Test (SPD Swiss Precision Diagnostics GmbH; manufacturer data). accessdata.fda.gov
9. U.S. Food and Drug Administration. “Ovulation (Urine Test).” Content current as of February 4, 2018. fda.gov
10. U.S. Food and Drug Administration. “Ovulation (Saliva Test).” Content current as of February 4, 2018. fda.gov
11. U.S. Food and Drug Administration. “Menopause” (home use tests). Content current as of September 27, 2018. fda.gov
12. National Institute for Health and Care Excellence. Menopause guideline NG23, “Recommendations” chapter (current online version, including the 2024 update; first published November 2015). nice.org.uk
13. U.S. Food and Drug Administration. “Class 2 Device Recall Menopause Test Cassette (Urine),” recall Z-1260-2026, posted February 4, 2026. accessdata.fda.gov
14. Getreu N, Grant Z, Vasavan T, Timpson A, Woolley T, O’Neill HC. “Analytical comparability of thyroid-stimulating hormone and free thyroxine across capillary and venous collection matrices for remote thyroid diagnostics.” Journal of Patient Centricity, 2026 (funded by Hertility Health Ltd). doi.org
15. U.S. Food and Drug Administration. “How to Report a Non-Emergency.” Content current as of March 29, 2018. fda.gov