The concept of morning urine is not a distinction that needs to be made by time, not that 5:00 am is morning urine and 6:00 am is not morning urine, but in fact morning urine means the first urine after waking up in the morning. The main purpose is to ensure the accuracy of the test, because the pregnancy test needs to detect pregnancy based on the human chorionic gonadotropin in the urine, and the HCG in the urine needs to reach a certain concentration before it can be detected by the pregnancy test. The purpose of using morning urine is mainly because you have not urinated all night, and holding urine for a longer period of time is more accurate, and it does not matter what time of day it is, as long as it is the first urine after waking up in the morning, the accuracy of the test can be guaranteed.