Please give your daughter a marvelous book called "The Thinking Woman's Guide to a Better Birth" by Henci Goer. It's available now on Amazon.
Having the research to support decisions and "issues" that she'll be exposed to will help her to relax and realize that if she is healthy enough to get pregnant, she'll likely be healthy enough to have a good birth. Chronological age does not always fall in line with biological/body age. After all, pregnancy and birth is the natural function of a healthy woman's body.
Best to the whole family!
Jan in VA (formerly a certified childbirth educator and labor companion)