Actually it was 1961 not 1962, it is widely publicized that he did not attend the birth, or live with the mother after the babys birth, and in fact, in Obama’s books stated that he left for Harvard before his birth.
Obama Sr did not graduate from U. Hawaii until spring of '62. By then Stanley Ann and little Barry had been in Seatle, probably for about 9-10 months.
But I see what you mean. Senior "left them" while everyone was still in Hawaii, if they were in Hawaii in the first place. If they were, which hospital was Barry born in?