I am proper chuffed that fewer women than ever are having children, and illsutrating that there IS more to life than having children, and that you can have a good, happy, full life without them.
I feel it's become more 'acceptable' now, and more women are choosing to stay childfree, and it's becoming more common.
Even as little as 5-6 years ago, women were being made to feel like they were doing something wrong by not having them, and that their lives wouldn't be 'complete,' and who will look after you when you're older etc.. (Like having children automatically means you will have a carer when you're elderly/infirm.) For a start it's not guaranteed that your DC will want to do, or will be able to. AND it's not fair to expect it of them.
I think some (younger) women have caught on now, as to how hard it is raising children, and how it's life changing, and how you never have any money to yourself, and how you always have to put those children first, and they depend on you 100%!
And it's not helped by how fucking useless most men are, and how almost everything is done by the woman in the house (and with the childcare.) And so yes, many women are opting out. Sadly, in this day and age, 'community' and the 'village' no longer exists, and many women are left alone to look after the children, often whilst being forced out to work, because of finances, or just being expected to go out to work because how dare she stay at home? 
Some men who 'let' their wife/the mother of their children being a stay at home mum, seem to want them back out to work when they children start school. Because children don't need looking after once they hit 5. 🙄