Pregnant ovulation test paper must be strong positive?

Ovulation test paper is to monitor the level of luteinizing hormone in the human body, because luteinizing hormone high will stimulate follicle ovulation, ovulation test paper strong positive generally in ovulation period will detect strong positive. Pregnant may also show positive, but ovulation test paper positive is not necessarily pregnant, so can only test urine inside hcg or blood HCG to test whether pregnant.