How do you comfort a friend who had a miscarriage?

I had to comfort a friend about this once. Even though she didn't say it, I knew she blamed herself for the miscarriage because she kept wondering it she ate or did something wrong. Some of her older relatives also insinuated that she worked too hard and that's why it happened. It's tricky but eventually I told her to ignore those comments and that none of it was her fault, that it's all part of God's plans (she's religious). She eventually made peace with her loss and not too long after, she gave birth to a healthy baby boy.