Inclusion criteria:
Women 18-45 years old
Have at least 2-3 months of history of excessive, long and irregular bleeding (lack of regular cycle 28-35, bleeding more than 7 days or heavy)
Have a phone number to follow up.
Exclusion criteria:
Pregnancy
Any cervical abnormality including cervical cancer, infection, trauma or polyp and uterine causes including: leiomyoma, infection, polyp, endometrial hyperplasia, endometrial neoplasia, cancer or the presence of a foreign body based on the patient's statement and medical records.
Having any kind of severe psychological stress such as: separation of parents, death of first-degree family members, etc. in the last 6 months.
Having any kind of systemic diseases, such as: thyroid disease (hypothyroidism and hyperthyroidism), adrenal glands, liver, kidney and blood disorders (von Willebrand disease, idiopathic thrombocytopenic purpura, and leukemia) based on the patient's statement and medical records.
Daily and regular intake of vitamin D supplements for the past three months.
Taking medications that affect the menstrual cycle and bleeding, such as: oral hormonal contraceptives, anticoagulants, serotonin inhibitors, antipsychotics, corticosteroids, hormonal supplements, phenytoin, or herbal supplements such as soy and ginseng.
Having premenstrual syndrome.
Have any absolute or relative contraindications to the use of combined contraceptive pills, including breast cancer, endometrial cancer, liver disease, deep vein thrombosis, smoking in people 35 years and older, cardiovascular disease, history of stroke, Diabetes, hypertension, migraine, hyperlipidemia, conditions requiring complete immobility, inflammatory bowel disease, major depression, and epilepsy require medication.