Frequently asked questions for Pregnancy Tests
All Clearblue Pregnancy Tests are more than 99% accurate at detecting pregnancy, when used from the day you expect your period.
When you are pregnant, your body produces the pregnancy hormone hCG (human Chorionic Gonadotrophin). The level of hCG doubles approximately every 24 hours in the first weeks, reaching a maximum at around 7 to 12 weeks into the pregnancy.
Clearblue Pregnancy Tests work by detecting tiny amounts of the pregnancy hormone in your urine and are over 99% accurate from the day of your expected period.
Clearblue offer a range of pregnancy tests, now including Clearblue Ultra Early Pregnancy Test which can give you results in words up to 6 days before your missed period. Click here to find out more.
If you take a pregnancy test before you expect your period and get a ‘Not Pregnant’ result, there is still a chance that you may be pregnant but the pregnancy hormone level is not yet high enough for the pregnancy test to detect. See the Clearblue Pregnancy Test product pages for details of results of clinical testing with early pregnancy.
If testing early, use the first urine of the day. If testing from the day of your expected period, you can take a pregnancy test with urine from any time of the day. Avoid excessive fluid intake before testing. If you are using the Clearblue Pregnancy Test with Weeks Indicator, you will need to use the first urine of the day to get an accurate estimate of how far along you are.
See your doctor for advice on your next steps.
You may not be pregnant or the level of pregnancy hormone may not yet be high enough to be detected. Test again in three days’ time. If this test gives you a ‘Not Pregnant’ result and your period is late, see your doctor.
I previously tested ‘Pregnant’ but have tested again and got a ‘Not Pregnant’ result, or my period has started. What does this mean?
Whilst the 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. If you do get unexpected results, ask your doctor for advice.
- Always read the manufacturer’s instructions for any medication you are taking before taking a pregnancy test.
- Fertility drugs containing hCG can give misleading results (these fertility drugs are usually given by injection, and testing too soon after administration may give a false ‘Pregnant’ result).
- Other fertility therapies, painkillers and hormonal contraceptives (e.g. contraceptive pills) should not affect the result.
- If you have recently stopped taking hormonal contraception or are using fertility therapies, your periods may be irregular, leading you to test too soon.
- If you have recently been pregnant (even if not carried to full term) you may get a false ‘Pregnant’ result.
- Ectopic pregnancy, ovarian cysts, menopause and some very rare medical conditions can give misleading results.
If you do get unexpected results you should discuss them with your doctor.
If using a Clearblue Digital Pregnancy Test, your ‘Pregnant’ or ‘Not Pregnant’ result will be shown in words on the display screen.
If using a traditional Clearblue Pregnancy Test, your ‘Pregnant’ or ‘Not Pregnant’ result will be shown in the Result Window as either a clear +/- result or clear blue line(s).
See Clearblue Pregnancy Test product pages for more information.
I have recently had a miscarriage or termination and I think I might be pregnant again. When should I do a Clearblue Pregnancy Test?
After a miscarriage or termination, it can take up to 9 weeks for the pregnancy hormone hCG to disappear from the body. If you take a pregnancy test during this time, it’s impossible to know if a ‘Pregnant’ result is caused by a new pregnancy or by hCG from your previous pregnancy. In this case, we would recommend that you contact your doctor.
I have recently had a baby and think I might be pregnant again. When should I do a Clearblue Pregnancy Test?
After giving birth, hCG may take up to 3 weeks to return to normal levels. If you take a pregnancy test during this time, it’s impossible to know if a “Pregnant” result is caused by a new pregnancy or by hCG from your previous pregnancy. In this case, we would recommend that you contact your doctor.
Yes, it’s important not to drink too much of any liquid including water or alcohol before you take a pregnancy test. It’s better to wait until you naturally need to pass urine. This way, you’ll avoid diluting your level of pregnancy hormone and getting a false ‘Not Pregnant’ result.