For Sale: 2 very vintage greeting cards (1940-50s). One says "Just to let you know I'm Expecting... Inside: You to have a Happy Birthday". It measures 4" by 5" and double folded. Signed by Audrey and has some tape marks where it must have been attached to a scrapbook. The other one measures 5" by 6" and has 6 pages, double folded, It says "Expecting, Are You? Say, That's Grand. The day is near due?  Inside: p.1 No wonder, the, so many thoughts Are going out to you-- p. 2 It surely is a big event And one you'll love to see p. 3 Repeated many, many times In years that are to be-- p. 4 You must be mighty proud and glad Ad here's a wish to say: Here's hoping that your -- p. 5 picture of girl with cake p. 6 Birthday is A Mighty Happy Day!  It is signed Lucy and also as some yellowed tape marks. 
Both use "expecting" as a joke.  I mail on receipt of payment. (Free Shipping)