I read this book about 14-May-2007. This is the first time I've read this book. The book is copyright 1960. This note was last modified Tuesday, 20-May-2014 08:50:10 PDT.
This is book 1 of the "Subspace" series.
This note contains spoilers for the book.
There is considerably more to the story than to the version included in the novel. Bobby Warner does acrobatics in zero g to prove she could, for one thing, and is embarrassed when people think she's showing off (and approve of her doing so).
It ends with Adams not adequately explaining the long gestation periods of the babies to anybody.