Early pregnancy test paper before use has a bright white spot, may be the test paper is contaminated, early pregnancy test paper after use has a bright white spot, may be a mark, is the urine soaked traces left behind. Early pregnancy test paper has a bright white spot before use, to check whether the test paper has expired or contaminated, the normal test paper is not activated will not appear bright white spot, has been invalid test paper should not go to the pregnancy test, will reduce the accuracy rate. Early pregnancy test paper in the use of bright white dots, may be a trace, is the urine soaked traces left behind, this can not determine whether the woman is pregnant, to determine whether the woman is pregnant mainly depends on the test paper appeared on a bar or two bars, negative for not pregnant, positive for pregnancy. The early pregnancy test paper is recommended to be used after 14 days of intercourse, before the test to master the correct method of testing, in order to improve the accuracy of the test.