Hi, I don't know if this will help or not, but I am the mother of 5 healthy children my youngest being 3, my daughter was a bit older than yours when the baby was born, she was 13. We are very close, and she told me all along she wanted to be there with me, so when she found out she could we brought her in. I won't tell you it was easy, because I did have a very difficult labor, and my son had to be stimulated for a while after he was born, because he didn't want to cry and breath, but she really didn't realize what was going on. There were points where she was nervous, and put the hood of her jacket over her head and face lol, but to this day she and I both are very happy she was there. I've noticed a very tight bond between her and her little brother, she's like a second mommy to him, and this might sound cold, but we live in the wilkes barre area, and more and more girls are having babies in high school. I personally thought it would be good for her to know that those cute little bundles aren't the easiest thing to get here. all in all I think what i'm trying to say is if you feel your daughter is ready for this, the closeness that develops between her and the baby and the lesson learned was well worth the risk. and don't forget, that most delivery rooms have cable tv, and what 9 yr old isn't entertained by that lol. I't is a good idea if your not sure to have someone there that can take care of her when she needs a break, maybe a walk to the cafeteria, gift shop etc., but it is a wonderful experience. good luck with whatever you decide and congrats!!
S.