For example: If your own frozen eggs don't survive thawing or fertilization or fail to grow into robust embryos, you can go online to one of the many commercial egg banks popping up across the country and order a batch of frozen eggs donated by a woman who looks like you. After they are injected with your partner's sperm, the resulting embryos can be transferred to your womb, and you deliver and nurse the baby.
The author and those she describes don't seem to realize that the baby is not an object, but a human being who (1) is totally "NOT-YOU" and has his own agenda, unrelated to your Mommy-dreams; and (2) is quickly going to grow out of being a baby into the rest of his life, which will not go according to your plans.
why bother to carry a baby when you are 55? Just pay a poor lady in India to do it for you.
And yes, Heinlein had that as a subplot in The Moon is a harsh mistress....