I think she was sent to an unwed mothers home in Vancouver. She intended to give up the baby. Then changed her mind and kept him. Explains how she showed up in Seattle with a newborn that she didn’t know how to diaper.
I find this theory very credible. I have long advocated a slightly different version of it. I thought Stanley Ann was sent to live with Aunt Eleanor Birkebeile (Known to be living in Canada in 1959, and later in Blaine Washington) or her Uncle Ralph Dunham, known to be living in North West Washington State, but a home for unwed mothers in Vancouver is also a good possibility.
I recall reading somewhere that it was indeed Stanley Ann's intention of giving him up, and I think I saw something about the Salvation Army as well. Does anyone else remember where the source of this information is? I'm thinking it may have been in Barack Sr's Immigration files.
I agree that it is very credible that Stanley Ann was in Northwest Washington/Canada during his birth. It makes more sense than any other explanation of which I am aware.