A pregnancy test with ovulation test strips may result in a double bar. Ovulation tests detect luteinizing hormone levels in the urine, while early pregnancy tests detect chorionic gonadotropin levels in the urine. Luteinizing hormone and chorionic gonadotropin have mostly the same molecular structure, so ovulation test strips will show a double bar when you are pregnant. However, it is not recommended to use ovulation test paper instead of early pregnancy test paper. Ovulation test paper is to detect whether the ovaries have ovulation before the woman is pregnant, there is no need to use ovulation test paper after pregnancy, want to know whether the woman is pregnant, through the early pregnancy test paper or pregnancy test stick to test, after pregnancy will test the result of double bar. After pregnancy, you should do a good job of regular pregnancy checkups, there are abnormalities in a timely manner to seek medical attention.