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Hiccups are an uncontrollable reflex of the human body. What exactly goes on within the body to generate this weird sound is highly debated. The fact that Hiccups can be heard and seen from fetuses suggests that the central circuit involved in producing Hiccups...

Hiccups are unwanted contractions of the diaphragm - the muscle that participates in breathing. Although evolutionary scientists have a few theories, the exact cause and purpose of Hiccups is unknown. They remain a unique and age-old feature of the human physiology that continues to elude scientists to this day.