Three pregnant ladies. (Risque but not crude).
There were three pregnant ladies, a blonde, a brunette and a redhead having morning tea together. The blond asks the other two if they knew what sex their babies were going to be.
The brunette answers "oh yes, when my partner and I conceived he was on top so we are going to have a boy".
Blonde has a think for a minute, "Gee I didn't know that".
"Oh yes responds the redhead. When we conceived, I was on top, so we are going to have a girl".
Blonde has an even longer think, then bursts into tears. 'No no, I don't want to have puppies"!