Somehwere at the beginning, someone asked about
"how is crew replentished? Are women on board"?"
A player of a void born figure asked the same to me. Hence I did not know and hadt no source material at hand, I ruled that his ship (and a lot of other ships) had "Keepers of Bloodline" (Adepts) who´s job was to minimize inbreed in the ship & needed to sanctionize a mariage. (me thinks...for this there WAS fluff somewhere!).
In addition, we came up with the concept that if ships meet (most likely, at port!) there would be some "marriage market" held, so both ships could "re-fresh" there gene pool with "stock" from the other ship. Of course, the captain of both ships would have the final word of such "bargains".
This give the whole ship affair an additional "feudal lords trading serfs" touch.
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... and of course, not only do the press ganges try to hire on the planet...but sometimes some people simply get "stolen" if the ship is in need for "fresh blood" and is unlikely to visit this world again during the next five or twenty years...