Teens to 23ish?
I was 19, that definitely felt young.
Friends started having babies at 23 and that's when people stopped reacting like 😱 "what did your parents say?" and started saying congratulations etc.
Old habits die hard for me though, a colleague is 28 and pregnant and I was still like "😱". I'm 25 and TTC #2 and I think when I get pregnant I'll still be scared of telling my parents 😂