Wondering

Y does are body have miscarriges are gurls bodys just diff or duz it happen to everyone???/

A lot of times the body knows when a fetus isnt forming properly, when there's genetic defects etc, and the body will expel the fetus... miscarriages (especially early ones) are probably more common than people realize...

sometimes it can happen if you don't take care of your self and sometimes it juss happens its all according to your body everyone is different

No, it doesn't happen to everyone, and there's no actual known reason why it happens, but sometimes the fetus just doesn't form properly and the body expels it.

it can happen to anyone and cases may vary from the hormones of the body to the woman being hit or hurt on her abdomen killing the fetus

EDIT: @ichi why would you say that?

miscarriages are actually very common. around 25% of women experience at least one miscarriage during their lifetime and a lot of these miscarriages happen before a women even knows she is pregnant.

Here is a site that is very complete on the topic
http://www.epigee.org/pregnancy/miscarriage.html