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Ovulation tests can help predict when a person will be most fertile and increase their chances of pregnancy. Here, we review eight accurate tests available to purchase online.

A quick look at the best ovulation tests

Most ovulation tests, or ovulation predictor kits (OPK), measure a person’s LH levels — especially the LH surge — to help them determine the days when they are most fertile.

Other tests also measure estrogen levels by detecting estrone-3 glucuronide (E3G) content in urine. E3G levels increase when ovulation is near, which triggers the LH surge.

These tests are around 97% accurate and can increase the chances of pregnancy while reducing stress.

Discover the best at-home fertility tests here.

Medical News Today chooses at-home ovulation tests that meet the following criteria where possible:

  • Accuracy: MNT will only feature kits that have a high level of accuracy.
  • Test results: MNT will include tests that offer fast results.
  • Convenience: MNT will feature some test kits that do not require sending a sample to a laboratory, allowing people to test when they wish.
  • Laboratories: For test kits that require sending a sample to a laboratory, MNT will choose companies that process test samples in CLIA-certified labs.

Medical News Today follows a strict product selection and vetting process. Learn more here.

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Many of these tests are not FDA-approved for home testing and should not replace ongoing consultations with a fertility specialist.

Please note that the writer of this article has not tried these products. All information presented is purely research-based and correct at the time of publication. All accuracy claims are from the manufacturer unless otherwise stated.

Best for easy-to-read results: Clearblue Fertility Monitor

  • List price: around $120
  • Result time: 2–5 minutes
  • Accuracy: 99%
  • Test type: urine sticks
  • Quantity of tests: zero — people must purchase sticks separately

The Clearblue Fertility Monitor provides daily fertility status and stores and tracks a person’s individual fertility data.

The monitor tracks both estrogen and LH levels. It can then provide information regarding the days when a person has the best chance at conception.

The product features a touchscreen display for ease of use and easy-to-read results.

While this product does not come with test sticks, people can purchase them seperately for around $72 on Amazon.


  • 99% accurate in detecting LH surges, according to the company
  • tracks fertility status in an easy-to-read machine


  • more expensive than many other options
  • people will need to purchase test sticks separately
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Best for a more eco-friendly option: Natalist Ovulation Test Kit

  • List price: around $21
  • Result time: 5 minutes
  • Accuracy: 99%
  • Test type: urine strips
  • Quantity of tests: 30 test strips

The Natalist ovulation test kit states it is 99% accurate in tracking a person’s ovulation. The test checks for levels of LH.

To use this kit, people urinate into the resuable cup, dip in the ovulation test strip, and then wait five minutes for the results. People can track their cycles in the included tracker.


  • Natalist is a certified Plastic Neutral company
  • the company states it produces no electronic waste
  • the silicone urine cup is reusable
  • less expensive than some test kits


  • some reviewers state the test strip shades are difficult to read
  • some customers say the cup is too soft and small, leading to urine spillages
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Best for a wearable tracker: Ava Fertility

  • List price: from $279
  • Result time: continuous tracker
  • Accuracy: up to 90%
  • Test type: a wearable device
  • Quantity of tests: zero

The Ava is an FDA-cleared wearable fertility test. According to the company, this tracker can identify a person’s 5-day fertility window up to 4 days sooner than hormone-based tests.

Research shows that the Ava Fertility Tracker is up to 90% accurate in detecting a person’s ovulation window.

The bracelet comes with three buying options:

  • Basic option: Includes free shipping, access to a tracking app and online community, and the wearable tracker.
  • Plus plan: Offers additional benefits to the Basic plan, including a money-back guarantee if a person is not pregnant within 12 months.
  • Premium plan: Offers additional benefits to the Plus plan, including a money-back guarantee if a person is not pregnant within 6 months.

Read our review of the Ava fertility tracker here.


  • people can use their FSA and HSA when paying for this device
  • some plans offer a money-back guarantee if they do not become pregnant within six or 12 months
  • offers continuous tracking during sleep
  • convenient to use


  • more expensive than most urine strip tests
  • not as accurate as urine strip tests
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Best for subscription options: LetsGetChecked Female Hormone Test

  • List price: $139
  • Result time: 2–5 days
  • Accuracy: no information
  • Test type: blood sample
  • Quantity of tests: one

This home test provides a comprehensive picture of a person’s hormonal and fertility status by checking four hormones: follicle-stimulating hormone (FSH), LH, prolactin, and estradiol.

A person sends a blood sample to a laboratory, and a physician reviews the test results to discuss them. Customers have access to 24–7 medical support.

While the company does not state how accurate this test is, it processes the sample in a CLIA-approved and CAP-accredited laboratory that meets state and federal standards.

In addition, people can subscribe to recieve a kit every three months and save 30%.

Read our review of LetsGetChecked here.


  • offers a subscribe and save option, which may be beneficial for those who want to check their hormone levels over a longer period
  • physicians review all test results, reducing the risk of user error
  • the company offers follow-up support if necessary


  • does not offer instant test results
  • not suitable for those who dislike taking their own blood samples
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Best for testing more hormones: Everlywell Women’s Fertility Test

  • List price: $149
  • Result time: within a week
  • Accuracy: no information
  • Test type: blood sample
  • Quantity of tests: one

This test uses a blood sample to measure five hormones that can affect a person’s menstrual cycle and ovulation. These hormones are:

  • estradiol
  • LH
  • FSH
  • thyroid-stimulating hormone
  • total testosterone

Customers can review a personalized digital report and attend a free live webinar where a healthcare professional will discuss their results.

Everlywell does not state how accurate this test is. However, the company warns that if a person is taking an oral contraceptive pill or hormone replacement therapy (HRT), the results will be different than if they were not taking these medications.

The company provides free shipping and accepts FSA and HSA cards. People can also opt to subscribe and save 15%.

Read our review of Everlywell here.

Use code “HEALTHLINE25” for 25% off.


  • uses CLIA-certified labs
  • accepts FSA and HSA payments
  • offers access to a free webinar with a healthcare professional


  • does not give instant results
  • does not accept insurance
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Best budget option: Ro Modern Fertility Ovulation Test

  • List price: $16
  • Result time: 5 minutes
  • Accuracy: 99%
  • Test type: urine sticks
  • Quantity of tests: 20 strips

This test comes with 20 ovulation tests that detect LH levels and work in sync with a person’s cycle. The company also offers a free app that a person can use to log their LH results.

The test determines a person’s two most fertile days and tracks low, high, and peak LH levels. Users can access an online community of other customers to discuss results and issues.

Customers receive free shipping, and monthly subscriptions are available. The company also accepts FSA and HSA cards.

If a person subscribes to monthly deliveries, each test kit costs $15.


  • offers access to an online community where people can share tips and advice with others
  • most affordable option in this article
  • simple to use


  • some people state it is difficult to read the test results
  • the app is currently unavailable on Android devices
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Best for irregular cycles: Mira

  • List price: from $199
  • Result time: around 20 minutes
  • Accuracy: 99%
  • Test type: urine sticks
  • Quantity of tests: 10 wands

The Mira Plus Starter Kit comes with 10 wands that work with the Mira Analyzer monitor. The company claims that these tests also work well for people with PCOS and irregular cycles.

The Mira Fertility Tracker app is iOS- and Android-compatible. It provides full fertile window tracking and AI-powered cycle analysis.

Mira is FDA-approved and has CE certification in the European Union and ships worldwide. There is a 90-day money-back guarantee, and customers have access to 24-7 support.

Read our review of Mira here.


  • reportedly suitable for people with PCOS and irregular cycles
  • offers fast results within 20 minutes
  • uses AI to analyse cycles


  • more expensive than many other urine test kits
  • people must use up to 20 wands per cycle, which can be very expensive
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Best value for money: Clearblue Advanced Digital Ovulation Test

  • List price: around $40
  • Result time: 5 minutes
  • Accuracy: over 99%
  • Test type: urine stick
  • Quantity of tests: 20 sticks

This test detects four or more fertile days each cycle and tracks LH and estrogen levels. It identifies a person’s high and peak fertility days. The test also comes with a reusable reader that shows the results on a digital display.

This option comes with 20 tests and requires a person to collect urine immediately after waking up. Users cannot perform another test for 48 hours while the reader is displaying peak fertility.


  • contains a reusable test reader and 20 test strips, making it suitable for use for an extended time
  • a digital display may be clearer to interpret than colored strips


  • some reviewers state they receive an error using the tests twice in two days
  • some customers say that the test returns errors if there is too much or too little urine
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The following tables compares the tests in this article on accuracy, quantity, and more.

List priceResult timeAccuracyTest typeQuantity of tests
Clearbluearound $1202–5 minutes99%urine stickszero
Natalistaround $215 minutes99%urine strips30 test strips
Avafrom $279continuous trackerup to 90%wearable devicezero
LetsGetChecked$1392–5 daysno informationblood sampleone
Everlywell$149within a weekno informationblood sampleone
Ro$165 minutes99%urine sticks20 strips
Mirafrom $199around 20 minutes99%urine sticks10 wands
Clearblue Advancedaround $405 minutesover 99%urine sticks20 sticks

The Food and Drug Administration (FDA) has affirmed that ovulation tests accurately detect LH and E3G hormone levels. However, accuracy depends largely on a person’s ability to follow the test instructions.

One 2018 study states that estrogen and progesterone measurements through blood or urine provide more precise indicators than natural family planning methods.

In one 2020 study, women who used home ovulation tests with a connected app were twice as likely to conceive during the first cycle than those who did not. A similar 2019 review suggests that at-home OPKs may improve fertility management.

However, LH surges may not always indicate actual ovulation. An older observational study states that LH surges are variable and have several types. For example, women with polycystic ovary syndrome (PCOS) tend to have high LH levels or multiple peaks.

Because of this, the tests cannot confirm the occurrence of ovulation with 100% accuracy.

People with hormonal imbalances may find more accurate results with nonhormonal methods of predicting ovulation than tests that rely on hormone levels.

Here we answer some common questions about these tests.

How long after a positive ovulation test are you fertile?

A person is usually fertile for 2.5 days (60 hours) after a positive ovulation test.

Ovulation typically occurs 1–1.5 days (24–36 hours) after the LH surge, and sperm can only fertilize an egg 1 day (24 hours) after the egg’s release from the ovary.

Learn more about becoming pregnant after ovulation here.

When should you take an ovulation test?

People should take an ovulation test if around 10–14 days before they expect their period to start.

What indicates a positive ovulation test?

Most urine stick ovulation tests will have an area above the strip a person dips into urine that will either show lines or turn a different color when it measures levels of hormones.

Each kit is likely to have slightly different positive indicators. It is important to carefully read the instructions before using the test.

Do ovulation tests tell you if you are fertile?

No. Ovulation tests tell people when they are most likely to be fertile and conceive.

If a person has concerns about fertility they should contact a healthcare professional who can conduct tests.

People use ovulation kits to predict their fertile window and increase their chance of becoming pregnant. However, these tests check for hormone levels and do not confirm ovulation with complete accuracy.

There are several ovulation tests available on the market, many of which are available to order online and use at home. Some require urine samples, some require blood samples, and some require saliva.

A doctor can offer advice on choosing and using ovulation kits or difficulty conceiving.