To achieve those lasting lashes, it's crucial to understand the growth cycle of natural lashes. Every individual has their own unique growth patterns, which influence the longevity of eyelash extensions. Natural lashes have a growth cycle of approximately 6-8 weeks, with each lash going through 3 different phases - the Anagen phase (growth), Catagen phase (transitional), and Telogen phase (rest). The Anagen phase is when the natural lashes are actively growing, and the eyelash extensions attach most securely. As the natural eyelashes transition to the Catagen and Telogen phases, some eyelashes will naturally shed and regrow over time, taking their lash extensions with them.