It is very accurate if the steps of getting the specimen are followed correctly, the ste are as follows :A.Urine specimens should be collected in a clean, dry container such as a urine collection cup. B.Specimens may be collected at any time of the day. First morning urine samples are preferred since they normally contain the highest levels of hCG. C.If not tested immediately, urine may be stored refrigerated at 36─46oF (2─8oC) for up to 48 hours. Samples must be brought to room temperature 59─86oF (15─30oC) before testing. D.If a sample will not be tested until more than 48 hours after collection, it should be stored frozen (-4 oF; -20oC or below). Prior to testing, frozen samples must be completely thawed, thoroughly mixed, and bought to room temperature.E.Urine specimens exhibiting visible precipitates should be centrifuges, filtered, or allowed to settle to obtain a clear specimen for testing.F.Specimen rejection criteria: Samples of unknown age or in unapproved containers should be rejected, and a fresh sample collected.
