In the second stage, the primary follicles develop into secondary and eventually tertiary, or graafian follicles.
第二阶段,初级卵泡形成次级卵泡,最终形成第三极卵泡,即格拉夫卵泡。
Osmosis-解剖与生理
In a secondary follicle, the primary oocyte is still in the prophase step of meiosis 1, but now the follicle has additional layers of granulosa cells, as well as theca cells.
次级卵泡中的初级卵母细胞还是停留在第一次减数分裂前期,而卵泡多了几层颗粒细胞,以及卵泡内膜细胞。
英语百科
Folliculogenesis
Although the process is similar in many animals, this article will deal exclusively with human folliculogenesis.
In biology, folliculogenesis is the maturation of the ovarian follicle, a densely packed shell of somatic cells that contains an immature oocyte. Folliculogenesis describes the progression of a number of small primordial follicles into large preovulatory follicles that enter the menstrual cycle.