A mum-to-be's bladder is pushed down and her stomach is lifted up to make way for her expanding uterus.
The gif comes from an interactive tool from the Museum of Science and Industry in Chicago.
It describes the uterus growing at a "rapid" rate, causing the organs to be "squeezed" and the muscle and joints "loosened".
"It shows how the organs in the abdomen and chest get squashed as the foetus grows, explaining how breathless the mother gets on exertion during pregnancy."
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