We recommend that individuals who are losing eyelashes to get checked by their doctor. Shedding and growing is natural. Excessive is not.
The eyelashes grow in stages, lasting 3-4 months.
The first stage (anagen) is when your hair grows a little every day (30-45 days).
The second stage (catagen) is the transition or regression phase when your hair follicles shrink, allowing the strands (bulb) to extend towards the surface (2-3 weeks).
Third stage (telogen) is a resting phase. Your hair bulb is inactive and the hairs eventually fall out (+/- 100 days)
Forth stage (late telogen) is reassembly. This is where new follicles are formed. Think of it as the re-awakening process before the lashes start back into growth phase.