Welcome to HealthcareMagic. Most home pregnancy
tests that check urine beta-HCG
are sensitive to 20-25 mIU/ml of HCG. The test can be positive anywhere from about 2-3 days prior to a missed menses to 4-5 days after, but usually it should be done 7-10 days past your missed period.
To confirm the status of your pregnancy, you can get a serum HCG test done which is more specific than a urine test.
Hope it helps you. Regards.