What are the reasons for delaying pregnancy test?

Postponed menstruation but pregnancy test is a bar may be due to premature testing time, irregular menstruation, pregnancy test quality problems, etc. 1. Testing time After a premature pregnancy, it takes some time for urine HCG levels to rise to detectable levels. If the test time is too early, false negative results may occur. It is recommended to test again after a week of menstruation delay, or according to the time of sexual life, test 10 - 14 days after sexual life, when the results are relatively more accurate. 2. Irregular menstruation endocrine disorders, mental stress, overwork, environmental changes, certain diseases (Such as polycystic ovary syndrome, etc.) may cause irregular menstruation, leading to delayed menstruation. At this time, further examination is needed, such as six sex hormones, etc., to clarify the cause and targeted treatment. 3. Pregnancy test stick quality problems If the pregnancy test stick expires, damps or operates incorrectly (Such as urine immersion test area is not standardized, etc.), may affect the accuracy of the test results. Can replace the pregnancy test stick re-test, strictly follow the instructions. In addition. There are some special pregnancy conditions, such as ectopic pregnancy, HCG levels rise slowly, may also appear pregnancy test negative. If menstruation is delayed for a long time and still does not come, accompanied by abnormal symptoms such as abdominal pain and vaginal bleeding, medical attention should be sought in time for ultrasound examination to rule out abnormal conditions.