@fluffypaws I thought that there was a partial match in one of the Culture novels, but not really. In Excession, a character has a suspended pregnancy that they decide to bring to term finally, and they had been both male and female at various times, but the whole of the pregnancy was in a female form. @bookstodon
@fluffypaws@bookstodon Not fully what you're looking for but "Different Kinds of Fruit" by Kyle Lukoff is a (midde grade) book where the mc is the child of a trans man who decided with his partner to conceive.