There appears to be a serious lack of imagination on this thread by those who think not being able or choosing not to have children somehow diminishes you.
Actually it's quite the reverse, some mothers subsume themselves into motherhood, they loose what they are and a lot will be bereft when their child leaves the nest, as it has been her raison d'être for the past eighteen years. There's a huge hole in her life and she has no idea how to fill it.
Meanwhile the childfree have few ties, can choose to study for well paid careers. Plenty of savings, a healthy pension, exotic holidays, the best of everything. Relationship break-ups are easy (albeit painful like any break-up). If they decide to break up, they are self sufficient financially and continue their lives pretty much the same.
It's is somewhat different for some women, (primarily if unmarried) who have children and are reliant on the man for money and a roof over their heads. If he's had enough, he kicks her and the children out of his home, she has no money of her own, and even if she works as a single mother, having been out of the job market for years, ends up with a minimum wage job so goes on benefits.
There are, of course, exceptions to both of the above scenarios but I have seen quite a few of both and from what I've read on here it seems a regular occurrence.
No doubt someone will find the exception and tell me I'm wrong.