Go With Meaning

(obsolete, transitive) To be pregnant with (a child).

Example: Used other than as an idiom: see go,‎ with.
  Although I liked your suggestion, I'll go with my original idea.
  Does this red skirt go with this pink blouse?
Shakespeare
  The fruit she goes with, / I pray for heartily, that it may find / Good time, and live.
1795, Great Britain. Court of King's Bench, Reports of Cases Adjudged in the Court of King's Bench
  If the husband was out of the four seas during all the time of the wife's going with child, the child is a bastard; but if he were here at all within the time, it is legitimate, and no bastard.