Anagen can last for two to seven years, depending on your genes.

生长期取决於你的基因 能够持续 2 到 7 年。

Follicles might also lose the ability to go into anagen, the growth phase.

毛囊也可能失去进入生长期的能力。

Using this knowledge, scientists have developed drugs that shorten the resting phase, and force follicles into anagen.

运用这个知识，科学家们发明了可以缩短休止期的药物，从而迫使发囊进入毛发生长初期。

The first is anagen, the growth phase, which up to 90% of your hair follicles are experiencing right now, causing them to push up hair at a rate of one centimeter per month.

第一个阶段是毛发生长初期，即生长阶段，多达90%的发囊正处于毛发生长初期，使他们以每月1厘米的速度把头发向上推。