毛發(fā)生長中期

However, hair follicles that are in catagen or telogen growth phases are less pigmented. 但是，毛囊處于退行期和休止期增長階段不太色素。

In catagen, the staining of LEF-1 became weaken obviously, and disappeared in ORS. 退化期,LEF-1表達明顯減弱，毛母質(zhì)中弱表達，外根鞘內(nèi)表達消失；

Conclusion hair growth lotion can promote the growth of hair follicle by inhibiting the appearance of catagen. 結論：生發(fā)液能夠延緩器官培養(yǎng)毛囊的退化期出現(xiàn)而延長生長期，促進毛囊長度的增長。

Conclusion It is suggested that EGF might stimulate the growth of hair follicle epithelium, and induce anagen transforming into catagen prematurely. 結論EGF對毛囊的生長有促進作用，主要是促進毛囊上皮的生長，并且誘導毛囊提前由生長期進入退行期。

The secondary follicles finish the reconstruction from August to September, and most of them enter into catagen in October. 10月份毛球細胞停止分裂，毛乳頭萎縮，大量細胞程序化死亡，毛根上移，毛囊進入退行期；

n.退化