Healthcare Professionals Clearblue Pregnancy Test with Weeks Indicator


Tells her how many weeks*

* Weeks since conception shown as 1-2, 2-3 or 3+

Digital pregnancy test displaying a pregnant result

The Clearblue Pregnancy Test with Weeks Indicator is special, in that not only does it inform a woman whether she is pregnant or not, but also indicates when she conceived. Discovering when conception took place may help expectant couples plan effectively for pregnancy. Studies have shown that the Clearblue Pregnancy Test with Weeks Indicator test results show a high level of agreement with standard-of-care ultrasound when ultrasound precision is taken into account.1-2 The Clearblue Pregnancy Test with Weeks Indicator has the added benefit that the information is available several weeks earlier.

The Clearblue Pregnancy Test with Weeks Indicator provides a clear result in words – "Pregnant" or "Not Pregnant" – providing a much greater degree of clarity for the consumer than non-digital tests.3 If the test result is ‘Pregnant’ a numerical result: "1-2", "2-3" or "3+", is also displayed indicating that conception occurred 1 to 2 weeks ago, 2 to 3 weeks ago or 3 or more weeks ago.

In a research study conducted by Clearblue amongst healthcare professionals, the vast majority of healthcare professionals felt that the Clearblue Pregnancy Test with Weeks Indicator would be useful to their practice and to their patients.4

Digital pregnancy test displaying a pregnant result


The Clearblue Pregnancy Test with Weeks Indicator is:

  • 2 tests in 1 – can also tell her how many weeks
  • Accurate – over 99% accurate at detecting pregnancy from the day of the expected period
  • Clinically proven  – Correlates with estimation of gestational aging by routine ultrasound*1-2
  • Sensitive – can be used up to 5 days before the missed period (4 days before the expected period)​5
  • Unmistakably clear – easy to read digital results for maximum confidence
  • Reliable – based on established technology
  • Simple to use – convenient and easy to interpret
  • Trustworthy – from Clearblue, the World’s No.1 selling brand in home pregnancy and fertility tests.6

* When ultrasound precision is taken into account.

Table One. Agreement between Clearblue Pregnancy Test with Weeks Indicator result and ultrasound estimate using Hadlock formula.2 Based on a study of 143 women pregnant with single viable pregnancies, in the US.

Weeks Indicator result Hadlock with adjustment for ultrasound error
1–2 94.6%
2-3 94.3%
3+ 100
Overall 97.8%


The Hadlock formula is frequently used in clinical care and is a pre-set formula for some ultrasound equipment. Other commonly used formula (e.g. Pexters, Wu) provide similar data.1


  • 1 Johnson SR. Home pregnancy test compared to standard-of-care ultrasound dating in the assessment of pregnancy duration. Curr Med Res Opin. 2011 2011; 27(2):393-401.
  • 2Johnson S, et al. Accuracy of a home-based device for giving an early estimate of pregnancy duration compared with reference methods. Fertility and Sterility. (2013) 100: 1635–1641.
  • 3J Pike, S Godbert, and S Johnson. Comparison of volunteers’ experience of using, and accuracy of reading, different types of home pregnancy formats. Expert Opinion on Medical Diagnostics. 2013:7(5); 435-441
  • 4 SPD data on file.
  • 5 In lab testing, 98% of pregnant results were detected on the day before the expected period, 97% were detected 2 days before, 90% were detected 3 days before and 65% were detected 4 days before the expected period (5 days before the missed period).
  • 6Based on international sales in nearly 20 countries compiled using independent market research data.


Always read the leaflet. This material is intended for healthcare professionals only. It is for general information only with no warranties, representations or undertakings; express or implied; and does not constitute medical advice. It may refer to products not yet registered or approved in a given country. Please ask your local pharmacist for products available in your country. Product images are for illustration only. Clearblue is a registered trademark of SPD Swiss Precision Diagnostics GmbH (‘SPD’). © 2022 SPD (except for any third party content identified as such). All rights reserved.