Laser Hair Removal - brazillian - lumenis light sheer.

I got my first session of laser hair removal done about 2 weeks ago with the Lumenis LightSheer laser. My question is: over 3/4 of the hair has fallen out and i am just wondering if typically when the hair falls out that means that its generally gone for good (obviously there are exceptions) or do people normally lose pretty much all thier hair after each session but only some of it grows back? I was just surprised to see so much gone in my forst visit if it is generally gone for good.

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