Losing the chance of enjoyment after having kids or trying to escape to take up the responsibility of parenthood does not seem to be a generic case.I know many couples who prefer to stay at home at weekends or avoid late night outings but still they do not have any such plans.That is because they wanna attain financial stability before having kids so that they can avail best facilities for their kids as nurturing kids is very expensive these days.Moreover they will not have to restrict their personal expenses as the family grows if they have handsome savings initialy.
Carrer consciousness in women seems to be the another reason but i guess that has no end.Even after 7-8 yrs of work,she will be at a position where still there is scope to rise so the rat race is never going to be over.This is how you maintain a balance between personal and professional lives.So better greet every phase of your life on time as children born early are healthy,moreover parents will not be very old as the kid grows up and needs your support.And you will get more years of your life to spend with your child.