Groink is right. It's a wonderful thing.
Some people who would love kids, can't. My cousin is 43, about to turn 44 soon. Been on IVF for 4 years and tried for 2 years without help to conceive. After many miscarriages, her due date is in July. It's a huge congratulations. Now not sure what to say to a preggo 14 year old, I think I'd be more speechless.
She should have tried 20 yrs ago...now, it's more about vanity, selfishness (to me)...because I know of about 8 40+ yr olds with newborn kids or about 3ish, and they either can't discipline them or are tired running after them...
40+yr olds shouldn't have kids in my book---because by the time you are 50ish-60ish, who wants to run with a 10 or 20 yr old? Shit is tiresome...
I agree with Groink---but, I can see what Deceide is saying, in absolute terms, why are you giving congrat to a woman for doing what a woman should do---have kids?
But, wishing one well, in terms of having a healthy child is the polite thing to do.