Riddle: I'm a riddle in nine syllables, An elephant, a ponderous house, A melon strolling on two tendrils O red fruit, Ivory, fine timber! The loaf's big with it's yeasty rising Money's new minted in this fat purse. I'm a means, a stage, a cow in calf. I've eaten a bag of green apples Boarded the train there's no getting off.
Answer: Only women get this way
Pregnancy (this is also a famous poem)