If you use early pregnancy test paper to check whether you are pregnant, in the menstrual delay 7-10 days after the use of accurate, it is best to use the morning urine, so as not to drink too much water caused by dilution of urine to affect the results of the test, it is best to choose the regular manufacturers of early pregnancy test paper, it is recommended that you use in accordance with the instructions to avoid the improper use of the test will affect the results of the test. Through the early pregnancy test paper check negative, need to draw blood to check the blood HCG, if both show no pregnancy, can completely exclude pregnancy, if through the early pregnancy test paper check no pregnancy, blood test pregnancy, may be irregular menstruation lead to fertilization late. If irregular menstruation using early pregnancy test paper, there will also be a certain error, menstruation delayed a week after the use of early pregnancy test paper negative, you need to review a week to see, can completely rule out the possibility of no pregnancy. If you are pregnant through the examination, it is best to pay attention to rest.