Maybe you weren't around then? Many young pregnant girls were sent "away" before they began to show, and didn't return until they had given birth. Let us know if you find ANY evidence that Stanley Ann Dunham was anywhere in the United States between March 1961 and Obama's birthdate.
ML/NJ
In Corsi's book, Where's the Birth Certificate?, he maintains that Stanley Ann Dunham's whereabouts for the time frame Jan. 31, 1961 (the last date of the semester in which she was enrolled at the U. of Hawaii) to Aug. 4, 1961 (the date given for Obama Jr.'s birth) are still a mystery at this point.