Hi Katie,
I would say it is your personal preference. I’m 27 and I had my surgery when I was 25. I do not have kids but am planning to at some point.
Most likely you would need to re-do your breasts after having kids, due to milk they will change. However, there are some people were not affected after first child. I personally was not considering to wait until I have kids for the following reasons:
1. I wanted to feel comfortable and happy during my young adulthood not only after I am in my 30s
2. I wanted to get my boobs done since I was 13 as they didn’t grow lol, I just had to wait until I was able to afford it.
My personal advise is – if you are planning to have a child within 1-3 years – then it is worth to wait until after to have a surgery but if you thinking about kinds in 5+ years then do it now and enjoy!
For me – best decision I have made, do not regret one bit!
Hope this helps! 🙂 But anything you do should be because you want it and it makes you happy