Pregnancy can definitely be detected 6 days late by a menstrual period, either by a blood test or by testing a woman’s urine, because normally a woman ovulates 14 days before her period. If you have sex at this time and you are pregnant, the trophoblast cells of the embryo will secrete human chorionic gonadotropin, which will be detected in the woman’s urine at the latest 14 days after ovulation and in her blood at the earliest about a week after ovulation. If the menstrual period is delayed by 6 days, it is about 20 days before ovulation and can definitely be detected at this time. If the urine test is 2 bars, you are pregnant. If there is one bar, you are not pregnant.