Beta-hCG can be detected in the blood 7 days after conception. The urine pregnancy test is sensitive to beta-hCG levels above 25 mIU/l. For this reason, the test should be carried out at the start of the missed period.
Measurement of beta-hCG is often a tool for diagnosing pathological conditions, such as diagnosing an ectopic pregnancy, or diagnosing and monitoring a molar pregnancy, which is a pathological development of a pregnancy.
If your doctor asks for repeated measurements of beta-hCG, these should be carried out in the same laboratory to ensure the stability of the result.