Kristine also had severe medical issues with her pregnancies, which some women do. These included a stroke, and lupus. These problems probably were autoimmune in nature. The possibility that a woman will need a lot of physical support from a spouse (and maybe others, like in the workplace) can never be predicted, so it is becomes a responsibility for others that doesn't have anything to do with "choice" or "personal responsibility" in the usual libertarian sense. That has possible moral consequences down the road in the way of supporting some socially conservative expectations that men particularly honor their gender roles.
The book does not number its chapters (it does name them) or provide a table of contents. Doing so might have been helpful.