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The WHO defines Type I FGM as the partial or total removal of the [[clitoris ]] ([[clitoridectomy]]) and/or the prepuce ([[clitoral hood]]); see ''Diagram 1B''. When it is important to distinguish between the variations of Type I cutting, the following subdivisions are proposed: Type Ia, removal of the clitoral hood or prepuce only; Type Ib, removal of the [[clitoris ]] with the prepuce.<ref name = "WHO - Terminology"/>

The WHO's definition of Type II FGM is "partial or total removal of the [[clitoris ]] and the [[labia minora]], with or without [[excision]] of the labia majora. When it is important to distinguish between the major variations that have been documented, the following subdivisions are proposed: Type IIa, removal of the labia minora only; Type IIb, partial or total removal of the [[clitoris ]] and the labia minora; Type IIc, partial or total removal of the [[clitoris]], the labia minora and the labia majora.<ref name="WHO - Terminology">{{REFdocument

The WHO defines Type III FGM as narrowing of the vaginal orifice with creation of a covering seal by cutting and repositioning the labia minora and/or the labia majora, with or without [[excision]] of the [[clitoris ]] ([[infibulation]])."<ref>WHO, 2006-10-02</ref> It is the most extensive form of FGM, and accounts for about 10% of all FGM procedures described from Africa.<ref>{{REFweb

There are other forms of FGM, collectively referred to as Type IV, that may not involve tissue removal. The WHO defines Type IV FGM as "all other harmful procedures to the female genitalia for non-medical purposes, for example, pricking, piercing, incising, scraping and cauterization."<ref name="WHO - Terminology"/> This includes a diverse range of practices, such as pricking the [[clitoris ]] with needles, burning or scarring the genitals as well as ripping or tearing of the vagina.<ref name="WHO - Terminology"/>