Hair Loss??

When does the hair loss start?  I'm 15 weeks out and I think my hair loss has started. I'm getting more hair in the shower drain than before, but it's not excessive yet.  Just curious as to the average time frame.

I'm 18 weeks out and I've just started to notice more hair in the brush after brushing, but it isn't really what I'd call bad. 

It starts 4-5 months post op and lasts a couple months regardless of how much protein, vitamins, or expensive shampoos you use.  Now's the time for a makeover.  Cut in some cute layers to blend in the new growth about to emerge so you don't resemble a chia pet.

A chia pet LOL that's fumny!  Thanks for your response.