Ladies who became mothers at a young age..

I know you love your children but the question is, if you could go back in time and change things, would you have waited? I'm trying to convince my friend who is 17 that she has plenty of time to have a baby! She's got it stuck in her head that she has to have a baby right now like she's getting old or something! I don't want any harsh comments, I just need honest but kind comments coming from a good place so that I can show her and hopefully she will realise..