Fig. 4From: In vivo antral follicle wall biopsy: a new research technique to study ovarian function at the cellular and molecular levelsMean (±SEM) thickness of the follicle wall layers obtained using the biopsy forceps technique versus the scalpel blade method in different follicle size groups. a granulosa, b theca interna, and (c) theca externa layers. No difference was observed within the same follicle size group between the approaches used to harvest the follicular wall samplesBack to article page