She never struck me as someone who wanted kids (can't recall if she ever spoke about it). I can't imagine many captains would be the type to want family life. It's hard to judge how things like this work in the Trek future as they tended to avoid looking too closely at it. There still seems to be a very traditional heterosexual, monogamous, gender role conventionality to it all though
Janeway will probably live to 135 so kids could come much much later if she wanted.
I was hoping this thread was gonna be about "should they have written Janeway as a mother". That might have been interesting. Thinking about it, none of the crew were trying to get home to any children, were they. Seems like an obvious character backstory to look at when considering the shows premise. It was all just partners and parents