“She turned 18 in November, which is right around the time Obama was conceived.
Mrs. Prince of Space”
Remember that a individual was not an adult until 21 at that point in time. They were still a minor. I may be wrong, but it has been stated on this forum in the past that the laws about conferring citizenship at the time stated that a person must live in the US for a period of time after their 15th birthday, in order to confer citizenship. That way a minor could not be used to give birth to a non-citizen, and then claim citizenship for the child.