Recommended frequency of hair loss treatments

I am looking into hair loss treatments because I am losing more hair than before every time I wash it. It seems to have gotten worse since giving birth.

Since this is my first time, I have many questions. I would like to know how many sessions are usually required once hair loss treatment begins.

It seems that the recommended frequency varies because the guidelines differ slightly from hospital to hospital.

For those of you who have received hair loss treatments, at what stage of progression do you notice changes?

I know there are individual differences, but I would like to refer to actual experience.

I would like to make a decision after doing thorough research rather than just starting out, so I would like to hear your opinion before a consultation.

It would be very helpful if you could share any aspects you were satisfied with or any tips that were helpful while managing it.