Normally the vast majority of women have a low volume on the first day of menstruation, and the second day is the most abundant day of menstruation. If the first day of menstruation is heavy, the second day is not. Clinically, it is important to exclude the possibility of miscarriage. In case of miscarriage vaginal bleeding will be more and lower abdominal pain will also be present. It is recommended to take a comprehensive clinical history to analyze whether there is a history of menopause and also to take blood for HCG. If the HCG is elevated, it is clinically very likely that miscarriage will occur. If there is a significant decrease in blood HCG on the next day, it indicates a complete miscarriage, so the possibility of miscarriage due to pregnancy should be ruled out first.