If u have a baby now you may get health weak, more tensions, face attraction will go down, and even u can't go for parties along with your partner. so totally only one word "tension" more responsibilities.
I think it depends on some things. Are you finalncially stable? Are you in a relatinship? What does the father think? As long as you are able to support a child and take care of it then Idon't believe that there is a perfect age to have a child.