1960s Pregnancy Tests: Hemagglutination Inhibition & Result Times

Question
During the 1960's a method called a hemagglutination inhibition test was used to determine pregnancy. Do you know how long it generally took to get the results? I need this for a novel I'm writing and haven't found the answer on the Internet. Thanks.

Answer
According to this page: http://www.freepatentsonline.com/4387166.html

Hemagglutination inhibition tests take a minimum of 5 hours to mature. Based on this information, I would make the educated guess that an average lady going to the doctor's office would most likely be informed by the office first thing the next morning or some time the next day.

Please let me know if I can help you further or with anything else.

Best wishes and good luck on your novel!
Helen =)