There is no relationship between a weak positive ovulation test on the 12th day of ovulation and whether or not you are pregnant. The main reasons for this are: 1. Ovulation test paper is used to detect ovulation, not pregnancy, and early pregnancy test paper is used to detect pregnancy. 2. A weak positive ovulation test paper may appear in the early stages of ovulation or 1-2 days after ovulation. The time of ovulation is determined by detecting the peak of luteinizing hormone, which means that luteinizing hormone is nearing its peak or has fallen from its peak, and the chances of pregnancy are higher if you have intercourse around 3 days before and after the ovulation day. Even if you are pregnant 12 days after ovulation, you can’t detect it with the early pregnancy test paper, and it is easy to have a negative test too early, mistaking it for no pregnancy.