Taking a urine test for pregnancy at night is not as accurate as taking a morning urine test. This is because urine testing at night tends to dilute the urine during the day’s diet, causing the body’s human chorionic gonadotropin levels to decrease, resulting in biased test results. Especially for women who have been pregnant for a short period of time, the test can easily be overlooked due to the low level of human chorionic gonadotropin in the body, but for women who have been menopausal for 40 days, a urine test at night will not affect the results because the hormone levels in the body are high at this time. For women who use early pregnancy test strips or pregnancy test sticks, it is recommended to take the morning urine test in the morning for higher accuracy, or you can go to the hospital for intravenous blood testing of human chorionic gonadotropin level, which is the most accurate result and the gold standard for early pregnancy diagnosis. Pregnant women are advised to have a balanced diet and to take regular pregnancy tests.