What about all the euphemisms for getting or being pregnant (many of them very contemptuous of women)?

in the family way
knocked up
up the pole
bun in the oven
eating for two
soon to hear the patter of little feet

This euphemism in limerick form was the lemma to a chapter in a computer language textbook I studied decades ago:

There was a young lady from Thrace
Whose corsets grew too tight to lace.
Her mother said: Nelly,
There's more in your belly
Than ever went in through your face!

I have long forgotten the relevance to what I was studying. But my surprise at finding it in such an unlikely place has helped me remember the verse ever since.