Not sure whether it's wise to wade into this debate but here goes! 
I think every woman should ideally do her utmost to be financially independent or at least have the qualifications/experience to get a job to allow her to be, before she commits to a long-term relationship with children if she chooses to do so. These days so many relationships split (and judging by the Relationship boards here, split acrimoniously or with the man being a complete toad) and most of the time the woman is left with limited financial help and all the children.
Having children before getting a career or at least a secure job would be a disaster for so many women. If you are left high and dry at home with the kids or the school runs and no real earning power, how on earth do you then have time to study full-time for 3-4 years to get a degree, and then you have to get a starter job in the chosen field. Guess who would get priority? People with no kids and/or the ability to work silly hours.
The only way women can protect themselves and their children is to get the training and relevant experience before they have said children, then if (as in a third of cases) things go pear-shaped, they will still have that safety net.
Kirstie is in cloud-cuckoo land.
My life order was degree, masters, PhD, postdoc, serious boyfriend, house at 30, marriage at 37 and finally DS when I was 40 and jobwise fairly senior and secure. Worked for us, and we were extremely lucky to have a choice over at least some of the timings! Yes we might not have been able to have children that late, but we were prepared for that to be the case and took the risk.
I have a friend who had children at 24 and has struggled and struggled to get the training she needed after she and DH split. Her DC are now teens and she is still broke and single. I expect she would like to say a few words to KA.