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Hematologic characteristics in IUD users.

Increased uterine bleeding has often been cited as a frequent side effect of IUD usage. Previous reports have consistently linked IUD usage to increased menstrual blood loss; however, the role of the IUD as an etiologic agent in the development of iron deficiency with or without anemia is still unclear. This study examines hematologic and menstrual parameters in 52 IUD subjects and 40 control subjects. 90% of subjects with an IUD reported an increase in the amount and duration of menstrual flow and 35% noted intermenstrual bleeding. However, in a group of healthy women, the use of an IUD was not associated with significant or detrimental changes in common hematologic parameters.