Pregnancy Tests

Clearblue offers a range of pregnancy tests, all of which detect the clinically proven urinary pregnancy marker – human chorionic gonadotrophin (hCG) to provide accurate and trusted results.

How hCG is used to detect pregnancy

The hormone hCG is produced in the earliest stages of pregnancy. During early pregnancy it plays a role in survival of the corpus luteum1 and has a significant role in the implantation of the blastocyst and protection of the embryo against immune attack at the fetal/maternal boundary. The hormone is initially produced by the embryo and therefore acts as a marker for its presence.2

Levels of hCG rise rapidly and predictably in the earliest days of pregnancy3 and it usually first appears in urine 8-10 days (range 6-12 days) following the estimated day of conception when using the most sensitive laboratory assays.4 The levels of hCG in early pregnancy have also been found to be highly similar between women.4 This makes hCG an ideal urinary marker for quickly and accurately assessing whether a woman is pregnant or not. 

Clearblue Pregnancy Tests can be used up to 5 days before the missed period

Published literature shows that hCG levels reach at least 50 milli-International Units per milliliter (mIU/ml) on the day a pregnant woman's period is expected.5-7 If a Clearblue Pregnancy Test is used on the day of the expected period, it is more than 99% accurate at detecting pregnancy.8 The high sensitivity of the Clearblue Pregnancy Test also means that pregnancy can be detected up to 5 days before the missed period. The graph below shows a typical rise in urinary hCG from the first detection of pregnancy. 

Day relative to day period is due

Reference ranges for urinary intact hCG for each day of pregnancy
*From calculated day of ovulation (LH surge +1 day)
Median, 10th and 90th centiles shown. Data from 109 UK volunteers7

Not all pregnant women who test before the day of their expected period will obtain a 'pregnant' result. This is because urinary hCG levels may not yet be above the threshold for the test.

All Clearblue Pregnancy Tests are rigorously tested using early pregnancy urine samples from women whose luteinizing hormone (LH) surge day is known and from which the day of expected period can be reliably estimated.7 Using these samples it is possible to assess the proportion of pregnant women expected to have sufficient hCG levels in their urine sample to generate a 'Pregnant' result, on each day with respect to the day of the expected period. If women choose to test early with Clearblue Pregnancy Tests, the likelihood of detecting pregnancy before the day of the expected period is clearly displayed in the product packaging. Clearblue advises any woman who tests and gets a ‘Not Pregnant’ result, but still suspects pregnancy, should test again on the day she expects her period, if she tested early, or in a further 3 days if her period is overdue.

Clearblue tests are over 99% accurate from the day of the expected period8

At Clearblue we believe that consumers need a result they can be confident in and act on, and therefore we provide pregnancy test products that are over 99% accurate at detecting pregnancy from the day of the expected period.8

Digital results for greater accuracy in consumers’ hands

The Clearblue DIGITAL Pregnancy Test with Smart Countdown contains an optical reader which provides clear digital results in words thereby eliminating the human error that can occur when reading traditional line tests.9.

The Clearblue DIGITAL Pregnancy Test with Smart Countdown also features a unique progress indicator (Smart Countdown) to reassure the user the test is working and indicate when they can expect the result to appear.  It features the following important benefits:

  • It is the only pregnancy test that counts down to the result
  • It is over 99% accurate from the day of expected period8
  • It contains a wide ‘no mess’, absorbent tip and integrated Floodguard™ Technology to help reduce the #1 reported usage error10
  • It is sensitive enough to be used up to 5 days before the missed period11
  • It provides a simple result in words: 'Pregnant' or 'Not Pregnant' for greater accuracy in consumers’ hands.9

Visual signs give consumers confidence

Over 30 years of consumer research has given Clearblue an exceptional understanding of our consumers’ needs, allowing us to develop the next step in visual home pregnancy tests. Not only is the Clearblue Rapid Detection Pregnancy Test over 99% accurate at detecting pregnancy hormone, but it is also easy to use. The innovative Clearblue Rapid Detection Pregnancy Test offers many important benefits:

  • It provides an easy-to-read pregnant (+) result from 1 minute when used from the day of missed period. The user should wait 3 minutes to confirm a not pregnant (-) result
  • It is over 99% accurate8
  • It has an ergonomic handle, designed to make the Clearblue Rapid Detection Pregnancy Test easy to use
  • Its Color Change Tip helps women to perform the test more easily
  • Its integrated Floodguard™ Technology helps women to use the test correctly