Ovulation test paper in early pregnancy may show weak positive, will not show strong positive, ovulation test paper is mainly used to monitor whether the follicle development is mature, in the follicle development and maturity is about to discharge the egg, will show strong positive. In the ovulation test paper from strong positive, suddenly turned weak moment of ovulation, ovulation test paper after ovulation should show weak positive, if the egg after ovulation can be timely and sperm combination, the formation of fertilized eggs, in the early stage of ovulation ovulation test paper may show weak positive. With the passage of time, ovulation test paper will gradually show negative, ovulation test paper is mainly used to monitor ovulation, can not be used to diagnose whether the pregnancy, if you are not sure whether the pregnancy, 10 days after intercourse can be drawn blood tests to check the blood HCG value, to see whether it is significantly higher. If there is a significant increase indicates pregnancy, this method of testing early pregnancy, the earliest and most accurate.