My doctor had told me I could never conceive naturally. After 10 years of "when are you going to give me a grandbaby?", I announced to my inlaws that we weren't. Shortly afterwards, my husband decided we should try medical intervention (drugs) and with misgivings, I said okay.
The night before I was planning to make an appointment, I took the test. Positive, but I disbelieved so I took another. Positive. I simply blurted it out to my husband on the cell phone. Even after an exam, the doctor said I couldn't possibly be pregnant -it must be fibroids (which had a spine and heartbeat shown by the ultrasound......hmmmm!)
My approach with my sister was funniest of all. I just kept calling her "Aunt" and she thought I was talking about the fact that her dog was pregnant! Finally, I said "No, not Grandma, AUNT!!!! You are going to be an AUNT!" That finally got her attention.