The events in Resolutions took between 2 and 8 months depending on how liberal you want to examine the information. The story actually started after Janeway and her XO had been in Stasis for a month...
Almost a year.
9 months is so almost a year.
Long enough to make a human baby.
Tom Paris was Voyager's First Officer the whole time under the tutelage of Captain Tuvok.
Question: Did Tom get bumped up to Lieutenant Commander during Resolutions?
He should have been.