Hair loss... Can it be prevented??

Ever since I had the baby, my hair has been falling out.

Hair loss has been ongoing so far.

I've been consistently using only hair loss shampoo.

It seems to have no significant effect.

No.. I only used hair loss shampoo, so this is about as much.

I don't know what I missed.

I'm taking two biotin supplements.

How can I prevent my hair loss?

I don't knowㅠㅠ