Growing up I had a not so great self image. My face broke out when I was young, and didn't clear up until I was in my 20's. I hit puberty somewhat early (earlier than any of my friends anyways) and with that came body changes that can be difficult to accept at first - especially when it seems that no one else is going through them with you.
Fast forward to pregnancy and things started changing - again. Hormones caused my face to break out again and things started shifting. I was a little nervous about how I would react emotionally to these changes, but I embraced them. As your body starts to shift and grow to accommodate the growing baby - it can make some women self conscious, especially before it is obvious it is due to pregnancy.
I was fairly lucky, my body went pretty much back to normal immediately after my boys were born. Some women do not have the same experience, and can be quite self conscious about the belly fat that seems stubborn and doesn't shrink.
I look at my stretch marks and think about how it felt to feel my children moving inside me; knowing that my body looks the way it does because of carrying my 2 boys and birthing them, makes me smile. I have come to accept the changes being a mom has made to me.