Most home pregnancy tests are reliable, for example Clearblues tests have an accuracy of over 99% from the day you expect your period, and while its possible a test showing a negative result is wrong, particularly if youre testing early, getting a false positive is extremely rare.
How accurate is a Clearblue?
In laboratory tests Clearblue Digital Pregnancy Tests is more than 99% accurate in detecting whether or not you are pregnant, when used from the day your period is due. If you test before your period is due and get a not pregnant result, there is still a chance you may be pregnant.
How far gone can clearblue tell you?
Its smart dual sensor not only tells you in words on the digital display if youre pregnant or not pregnant, it also tells you how far along you are – the weeks since conception are shown as 1-2, 2-3 or 3+. You can test 5 days before your missed period (which is 4 days before your expected period).
Can you have 4 positive pregnancy tests and not be pregnant?
Chemical pregnancy Its possible to have a positive pregnancy test even if you arent technically pregnant. This is called a false positive. Its sometimes caused by a chemical pregnancy. A chemical pregnancy occurs if a fertilized egg, known as the embryo, is unable to implant, or grow, very early on.