Ovulation test strips cannot detect pregnancy. Ovulation test paper is used to check the peak level of luteinizing hormone in the body to predict whether ovulation is occurring or not, and is not used to check whether pregnancy is occurring or not. Women who usually have regular periods ovulate about 14 days before their next period, which is the day of ovulation. During the 2-3 days before and after the day of ovulation, ovulation test paper may be positive, while at other times, ovulation test paper is mostly negative. Some women may also ovulate early due to environmental, emotional and exertional influences. When determining whether you are pregnant or not, you can mostly use the early pregnancy test. When your period is delayed for more than a week, you can use an early pregnancy test to check if you are pregnant. If the early pregnancy test is positive, i.e. two bars, it means pregnancy. If it is negative, you can repeat the test after 2-3 days. The most accurate way to check pregnancy is to take a blood HCG test. If a woman has menopause after unprotected sex, she can go to the hospital to have her blood HCG measured, and if it is on the rise and the progesterone value is high, pregnancy can be confirmed.