When to take a pregnancy test: Timing is everything

Craving ice cream and pickles? Feeling grumpy one minute and happy the next? You might be baking a tiny human! But before you start ordering pizza for two, let's talk pee and patience. Because when it comes to pregnancy tests, timing is key.

Baby? Maybe. Test? Definitely!

Did you know that the first pregnancy test was invented in 1927 by German scientists Aschheim and Zondek? ¹ The A-Z test is considered to be the first of its kind; detecting pregnancy through the presence of human chorionic gonadotropin (hCG) in urine. The test was groundbreaking at the time and consisted of injecting a woman’s urine into a female mouse. If the woman was pregnant, hCG in the urine would stimulate the ovaries of the injected rodent. If the immature rat or mouse went into heat despite its young age, the woman was likely pregnant.¹

The Sexual Revolution

The 1970s, a period of important social and cultural transformation marked by the widespread availability of the birth control pill and the legalization of abortion, brought about the Sexual Revolution. This era led to a surge in research on reproductive health, with prenatal care and testing becoming a routine part of the American healthcare system.²

Modern day pregnancy test

In 1976, the 'Error Proof Test' became the first FDA-approved home pregnancy test available in the United States. Results were typically available within two hours.²

Can you imagine having to wait two whole hours to find out if your sudden mood swings are courtesy of a tiny human growing in you or…the full moon?

Dos and Don’ts of pregnancy testing

In 1985, Clearblue® revolutionized home pregnancy testing with the world's first "rapid" test, delivering accurate results in a mere 30 minutes.³ In 2025, the Clearblue Rapid Detection Pregnancy Test results can be visible in as little as one minute!

Understanding the dos and don'ts of taking a home pregnancy test can make all the difference.

Do ✅

• Check the expiration date
• Read and follow ALL the instructions
• Use your first morning pee if you’re testing before your missed period

Don't ❌

• Take a pregnancy test too soon
• Drink too many fluids before testing
• Hold the test with the tip pointing upwards

The proof is in the pregnancy test

Missed period? Sudden midnight sugar cravings? Sometimes, even before that line appears in the window or the word PREGNANT is clearly displayed, you might suspect you’re pregnant. If you’re experiencing any of these early symptoms of pregnancy, you might want to consider taking a pregnancy test: ⁴

• A missed period
• Peeing more often than usual
• Feeling tired
• Nausea
• Sore and/or swollen breasts
• Food cravings and/or aversions
• Mood swings
• Period-like cramping
• Spotting

Pee, patience, and pregnancy testing

Is there an ideal time to take a pregnancy test? The short answer is … yes! Basic human biology requires a bit of time for the egg to fertilize and implant into the uterine wall. And the hCG we talked about earlier? It requires time to produce sufficient levels to be detectable on home pregnancy tests.⁵

While it’s tempting to test right away, do your best to give your body time to do its thing! Depending on the average cycle length, a significant rise of hCG typically takes about a week to 10 days.⁵ Have you heard of the Two Week Window? It’s the phrase for having to wait about two weeks to see if hCG is rising. It may feel like an eternity, but it’s part of the process. If waiting until a missed period seems impossible, the Clearblue® Early Digital Pregnancy Test can tell you 6 days sooner than your missed period (which is 5 days before you expect your period).⁶

Clearblue® offers a variety of home pregnancy tests to meet you where you are in your trying to conceive journey. Rapid testing? Early testing? Digital testing? Clearblue® has you covered. Whichever test works best for you, you can be rest assured that all Clearblue® tests are over 99% accurate from the day you expect your period.⁷

Conclusion:

So, there you have it: learning when (and when not) to test is fairly straightforward. Take a breath, read the instructions and know you’ve got this! If you’d like to learn more about when you can use a Clearblue® pregnancy test based on your cycle length, try our testing calculator to determine YOUR best time to test.

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• Home pregnancy tests: Your most pressing questions, answered