The test paper can be used to determine whether a woman is pregnant or not, but it can only be used as a screening method, because there may be false negatives and false positives, which may lead to wrong judgments. 2. It is best to take the morning urine to do the test. 3. Blood test can also be done to determine if the HCG level in the blood is pregnant. 4. Ultrasound test can be done because there is an error in the early pregnancy test paper, so in order to determine if you are pregnant, and also to know the specific situation of pregnancy and to exclude the risk of ectopic pregnancy, you can go for ultrasound test.