How long after ovulation can pregnancy be detected

After ovulation period, if there is cohabitation, you can take HCG test more than ten days after cohabitation; or more than 18 days after cohabitation, you can know whether you are pregnant. If you are pregnant, you can determine whether it is intrauterine pregnancy after five weeks of pregnancy. If you determine intrauterine pregnancy, you can start oral folic acid and regular check-ups.