Whilst Clearblue Rapid Detection Pregnancy Test is over 99% accurate at detecting the pregnancy hormone from the day of the expected period, it’s possible to get a pregnant result and find out later that you’re not pregnant (i.e., you may later get a not pregnant result, or your period may start). This may be due to natural loss during the early stages of pregnancy, known as ‘early pregnancy loss’, which sadly is not uncommon, as around 1 in 4 pregnancies end in early pregnancy loss.