Women in this country do need to be having more children BUT, and it's a huge but, other things need to be in place for this to happen. Men need to actually start behaving maturely and carrying equal weight in raising children. There are far too many men who aren't ready for relationships or behave very badly in them. Women are understandably going to be reluctant to want or have children in such a relationship, if they aren't confident that their children will have a good father who sticks around and carries his weight.
The other thing is of course finances - it's expensive to have kids and more support needs to be given if women are to take the time to have and raise children.
Also we need to get rid of this idea that the world is 'over populated'. People are dying all the time. We don't know when another natural disaster is going to occur and wipe out hundreds of thousands. We need more people, not less.
That's my two-penneth!