Table 1 Inclusion and exclusion criteria

I. Title contains "Menorrhagia", "Abnormal Uterine Bleeding" or "Heavy Menstrual Bleeding"

II. Minimum number of studied children is 10

III, Children are age 0–21 years old

IV. Study entry criteria requires review of all children with menorrhagia without another co-existing diagnosis or treatment modality. For example, studies that examined the etiology of menorrhagia from only children with known bleeding disorders were excluded

V. Not a case report

VI. Not a review article

VII. Not an editorial

VIII. No language filter was utilized, but an English abstract was required