When is the best time to take a pregnancy test morning or anytime? i'm 4 days late.

First morning urine: has the highest concentration of beta hcg which the test identifies. So this would be the best time to do the test.

Pregnancy test: The urine in the morning is more concentrated, so early hormones of pregnancy will be a bit more concentrated, and thus detectable. Otherwise, there is not ideal clock time for this test.

Pregnancy test: the best is to collect the first morning urine for a pregnancy test.