RobF -
There are less women than men that are prepared to put in the hours and live the lifestyle that is necessary to succeed in politics. It's nothing do do with sexism. There are what, ~650 MPs. So you are saying that there are not 325 women in the whole of the UK what are prepared to be MPs!? 
It's no different to the world of business. Women aren't prepared to sacrifice their home and family life in the same way that men are.
Sorry - can't let that statement go. It's pure sexism.
There are many women without DC.
Many women who's DC are now adults.
Many women who have partners who are SAHDs.
Many women are discriminated against in the workplace when then announce their pregnancy.
Many women are paid less that men for the same job.
Many women are penalised for taking time out to have a DC.
BTW - there is no need for women or men to "sacrifice their home and family life" - this is just the way the current system works.
As for "Child benefit is for children. Not women. The fact that so many women regard it as "their" income is one of the main problems with it.".
Well, just
. I know this is a derail but can't let it pass.
You obviously no nothing of the history of child benefit. It's predecessor was the "family allowance".
In the first half of the last century women campaigned for a family allowance to be paid to mothers. It was brought in due to the gendered impact of poverty. It is a lifeline to many women as unfortunately their male partners withold and control £ (which is financial abuse).