Normal progesterone and vaginal bleeding may be caused by the low location of the gestational sac, preeclampsia, localized cervical lesions and other reasons. 1. Low implantation position of the gestational sac: If the gestational sac is implanted in a relatively low position, it may lead to a small detachment between the gestational sac and the uterine wall, causing capillary rupture, resulting in vaginal bleeding when the progesterone is normal. This kind of bleeding is usually intermittent and requires bed rest. 2. Pre-eclampsia: If vaginal bleeding occurs at the beginning of pregnancy and is accompanied by mild lower abdominal pain and other symptoms, it means that pre-eclampsia may occur. At this time, check the progesterone, if the value is normal, you can be observed or follow the doctor’s instructions for fetal preservation treatment. 3. Localized cervical lesions: If there are localized cervical lesions such as cervical polyps before pregnancy, vaginal bleeding may occur after pregnancy, and then the test shows that progesterone is normal. Progesterone normal and vaginal bleeding should be timely consultation, under the guidance of the doctor to clarify the diagnosis, targeted treatment.