Women’s low menstrual flow includes many causes, as follows: 1. Ovarian function problems: If the ovaries are not functioning well or are declining, there may be low menstrual flow or prolonged menstrual cycles. In this case, hormone replacement therapy is generally recommended to prevent menopausal syndrome.2. Abortion or curettage: If a woman has had multiple abortions or curettage before, this condition may damage the basal layer of the female endometrium and even produce adhesions and scarring, resulting in reduced menstrual volume and darkening of the color of the woman’s period. In addition, then estrogen and progesterone replacement therapy or supplementation therapy to grow the endometrium and increase the menstrual volume. 3. Endocrine diseases: If a woman has polycystic ovary syndrome, hyperprolactinemia, or abnormal thyroid function, this condition can also lead to a decrease in menstrual volume, and generally requires treatment of the primary disease to restore menstruation, i.e., to restore the menstrual volume or cycle. 4. Other factors: If Women have recently taken some weight loss drugs or diet, these may also lead to a decrease in menstrual volume, and it is generally advisable to resume a normal diet to gradually increase menstrual volume.