Luke 1:56 - Ellicott's Commentary On The Whole Bible

And Mary abode with her about three months. — This brings the time so close to the birth of the Baptist that we might well deem it likely that the Virgin waited for it. On the other hand, the next verse seems almost to imply her previous departure. In any case, we may think of the three months as a time of much communion of heart and hope on the great things which God had done and was about to do for Israel.