The main way to determine that you have miscarried in early pregnancy is by checking your HCG levels and looking for pregnancy symptoms. The most typical symptom when a woman is pregnant is menopause. Early pregnancy is prone to miscarriage because the placenta is not stable enough to connect with the uterine wall. If symptoms such as abdominal pain and vaginal bleeding occur in early pregnancy, it is considered to be pre-miscarriage, and you should seek medical checkups in time to determine whether you have miscarried if you experience the above symptoms. Common tests include blood tests for HCG (human chorionic gonadotropin) and ultrasound, etc. If the HCG level is significantly lower than the number of days of gestation, or if no embryo is detected in the ultrasound at around 40 days of pregnancy, it is considered to be a miscarriage. To know whether it is a miscarriage, you should make an initial judgment based on the clinical symptoms, and then seek medical attention for relevant examinations. Once the diagnosis of miscarriage is confirmed, it is necessary to observe whether there is any intrauterine residue, and if there is any residue, to perform a purging operation.