You MUST have them at the 'right' age. Everybody seems to have an opinion exsactly what that age is. Every time a mother in her 40s', 50s' or (god forbid!) her 60s' has a baby, especially if it is concived by using IVF, the press have a feild day and even Radio Four go a bit loopy.
This is a topic that everyone feels that they have a right to comment on; from colomists to taxi drivers it's ok to say "too young, too old, too irrisponsible"
Hmmm - didn't hear much of that when Rod Steward had his baby recently.
Ok - here's a new idea: The right age is when the woman bloody well feels like it!