Does implantation bleeding happen for everyone or just some?

With all 4 of mine I’ve never had implantation.

Only one out of my three pregnancies

1 of my 4 pregnancy i did have implantion bleeding

6 babies never got it.

I didn’t have it with my first two pregnancies but I did with my last . So I think every pregnancy and every person is different in this situation . But I’m pretty sure they do say it’s not a common symptom so it’s not something you HAVE to experience to know you’re pregnant .

I never got and have 3 kids.

I didn't have it either pregnancy

Didn't have it either time

I didn’t have it for both pregnancies.

I had it my first pregnancy but didn’t have it my second.

I’ve never had it

I didn’t have it for my 2 pregnancies.

I had it happen 2 out of my pregnancies. Other ones, I didn’t have it.