What is the reason for delayed menstruation even though there is no pregnancy in the test paper test?

Test paper test is not pregnant, but delayed menstruation, to consider with the test paper expired, test time is too early, gynecological diseases and other factors. 1. test paper expired: if the early pregnancy test paper is stored for too long, there may be a detection of erroneous results, for the preparation of women’s menstruation delayed, you can go to the hospital blood test to detect whether the pregnancy, so that more accurate. 2. Early detection: If the time of conception is late, the HCG index in the urine is low, there will also be negative results, you can wait for a few days to test again, to see whether it is positive. 3. Gynecological diseases: If you rule out the possibility of not conceiving, but the symptoms of delayed menstruation, you need to consider the possibility of gynecological diseases, such as endocrine disorders, pelvic inflammatory disease, endometritis and other problems can also cause delayed menstruation. It is recommended that if the period is delayed for one week and the possibility of pregnancy is ruled out, you need to go to the hospital for ultrasound or other means of examination to see if the delayed period is caused by diseases or other factors, and then follow the doctor’s instructions for treatment.