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In vitro culture of early preantral follicles of Peromyscus with 2D micro-drop and various versions of 3D hanging-drop methods: (A) A schematic illustration of the various methods used for in vitro culture of early preantral follicles, and (B) the quantitative data of development to the antral stage using the various methods. N: number of early preantral follicles. The figure is reprinted and redrawn from reference [46] with permission from Mary Ann Liebert Inc.
