I personally don't feel that pressure myself and I don't have children nor do I plan on it. But I fully understand that other women, perhaps many women, feel pressured or receive pressure from their families or friends even. It's not really fair.
I don't believe it's a failure to not procreate. It's a personal choice and we as women are empowered to make that choice for ourselves. Just as we can choose to be single and unmarried for our whole lives, we can also choose to not procreate.
And Jen Aniston? All the tabloids constantly talk about her possibly having a baby and that having been an important desire of hers. I wonder what the real truth is? It's constantly in the media: Jen's having a baby! lol.