A weak positive pregnancy test alone does not determine how many days pregnant a woman has been pregnant; the determination of the result varies depending on the test method. Usually a weakly positive early pregnancy test or urine HCG indicates a possible pregnancy of about 7-10 days. If the result of urine pregnancy test or early pregnancy test is weakly positive, it is possible that the woman is pregnant, miscarried or ectopic; however, it is also possible that she is not pregnant because some tumors, such as gravida, choriocarcinoma and kidney cancer, can also secrete HCG, resulting in a weakly positive result. Therefore, it is recommended that pregnant women should have a blood test for chorionic gonadotropin, which is the gold standard for pregnancy detection, and the actual number of days of pregnancy can be determined by combining the time of the last menstruation and the usual menstrual cycle. If the menstrual cycle is irregular, the ultrasound results should be used to determine the time of pregnancy and the size of the gestational sac, the germ and the length of the parietal rump can be used to estimate the time of pregnancy. Pregnant women are advised to avoid staying up late, ensure sufficient sleep, pay attention to regular diet, balanced nutrition, proper exercise, maintain a good state of mind and regular maternity checkups.