Reproductive system diseases such as gravidity, erosive gravidity and choriocarcinoma can make early pregnancy test positive. 1. Staphylococcus manifests as vaginal bleeding after menopause, abnormally enlarged and tender uterus. Ultrasonography shows falling snow or honeycomb shape. Human chorionic gonadotropin increases with gestational weeks and peaks at 8-10 weeks of pregnancy. Early pregnancy test is positive. 2. Erosive hyperemesis gravidarum: mostly secondary to hyperemesis gravidarum pregnancy, manifested by irregular vaginal bleeding, incomplete uterine regrowth or uneven enlargement. Human chorionic gonadotropin is persistently high and early pregnancy test is positive. 3. Choriocarcinoma: It can be secondary to gravid pregnancy or non-gravid pregnancy, with a high degree of malignancy and hematogenous metastasis to the lungs. The human chorionic gonadotropin level is persistently high and the pregnancy test is positive. When pregnancy is suspected, you should go to the hospital for relevant examinations to rule out related diseases and carry out pregnancy under the guidance of the doctor.