I experienced a lot of hair loss some weeks after giving birth which lasted a few months - pretty standard stuff. All calmed down, started regrowing. After I finished breastfeeding / periods returned when baby about 12 months it seemed to kick off again. I'm now 18 months postpartum and I am still losing excessive amounts of hair.
I have very thick hair so it's not noticeable, but it concerning me a bit as I'm wondering what the underlying cause could be.