Interesting thread, lots of strong opinions.
OP I get the intent of your post, you're not saying that anyone under 25 should not start a family, rather it was an arbitrary figure.
I think it highlights a rather important issue that people don't seem to be able or want to acknowledge- it's all very well smugly berating the OP for not 'having chosen to have children earlier'. But hang on, what about all the men involved in this?
OP made it clear that she didn't meet her DP until she was 32...we are not all lucky enough to meet the right man in our 20s. Or should women bite the bullet and reproduce with whoever they're with before the age of 30...?
So many men seem put off by kids & marriage before 30 when ironically it's the best time for women biologically speaking.
I have close friends who wasted time in relationships if 5+ years with men who were lovely but ultimately total commitment phobes who trotted out every excuse under the sun to delay marriage & TTC.
Some if those friends find themselves aged 35+ with no partner or in a situation where marriage/babies seem so far off. Sadly they wasted their best fertile years with men who ultimately did not want to commit. IME this is not a rare occurrence.
I agree with the poster who says men should have the same fertility window as women- however I suspect this would mean that the human race dies out! Men would not be convinced until time ran out :-)