When can I take a pregnancy test?

After the egg is fertilized, it travels to the uterus (womb) and implants itself in the uterine wall.  At this stage, tiny amounts of the pregnancy hormone, hCG, start to appear in your urine.  It is this hormone that all home pregnancy tests detect.

When did your last period start?
E.g., 14/08/2019
Your usual cycle length:
If you took an ovulation test add the date of your positive result here (optional)
E.g., 14/08/2019
Calculate when I can test

First day you can test

 
with
Pregnancy Test with Weeks Indicator
Only test that tells you
how many weeks1

Your personal cycle information

Start of your last period
Positive ovulation test date
Your usual cycle length:
days
Results are based on the information you have provided.
Change my information

No matter when you test, you can be confident in the accuracy of a 'Pregnant' result with any Clearblue Pregnancy Test. But if you are testing early, you should be aware that even if your result is ‘Not Pregnant’, you may still be pregnant. This is because levels of hCG vary from woman to woman and there may not yet be enough hormone for the test to give a positive result.  However, hCG levels rise rapidly in early pregnancy, as shown in the graph below, meaning that if you test again on the day of your expected period, your result (whether positive or negative) will be over 99% accurate1

Rise of pregnancy hormone
(hCG) in early pregnancy

Relative hCG
concentration
 
 
 
 
 
 
8
7
6
5
4
3
2
1
0
Ovulation
hCG can start to appear in urine around this time
First day you can test with Clearblue Digital Pregnancy Test with Weeks Indicator
Expected
period
Missed
period
Days before missed period

So if you are thinking of testing before your missed period, try a Clearblue Digital Pregnancy Test

First day you can test
Day vs missed period -6 -5 -4 -3 -2 -1 0
Day vs expected period -5 -4 -3 -2 -1 0 +1
% of Pregnancies detected 79% 96% > 99% > 99% > 99% > 99% > 99%
  • 1 99% accurate at detecting typical pregnancy hormone levels. Note that hormone levels vary. See insert.