follicle meaning

noun a tiny hole or sac inthe bodyCOMMENT: An ovarian follicle goes throughseveral stages in its development. The first stage is called a primordial follicle which then develops into a primary follicle and becomes a mature follicle by the sixth day of the period. This follicle secretes oestrogen until the ovum has developed to the point when it can break out leaving the corpus luteum behind. foot