Questions about Blood Test

Patient: If i am 4 days late for period but getting negative hpts, when should I go get a blood test if I am concerned about ep?

Doctor: Hi,Thanks for the query.I understand your concern.Usually urine pregnancy test can give accurate result after on e week of expected date of periods but quantitative blood test can give accurate result on the day of expected period itself.So, now you can go for blood test for pregnancy.Take care.