The first thing you need to know is that you are not going to be able to get your hands on the right kind of paper, but you will need to be able to get your hands on the right kind of paper. 1. is pregnant: after pregnancy human chorionic gonadotropin will be doubled in 1.7 ~ 2 days, soon to menstruation indicates that the fertilized egg has been on the ground for about 7 days, this situation in the urine human chorionic gonadotropin will be more, and human chorionic gonadotropin will interfere with the results of the ovulation test paper, which will result in the continued a few days of the strong positive. 2. Not pregnant: the menstrual cycle can be affected by a variety of factors, such as mental overstress, psychological stress, fatigue, etc. If the menstrual cycle is prolonged, ovulation is delayed, this situation will appear ovulation test paper strong positive. In addition, if you are taking HCG-containing drugs, such as alanine acetate, urea folliculin, etc., this situation will also affect the test results of the test paper, appearing strong positive. The strong positive ovulation test paper can not clearly determine whether the pregnancy, you should go to the hospital in time to do the examination, you can through the early pregnancy test paper or blood test HCG to determine, the above drugs can not be used without authorization.