New research has left people shocked at the number of calories pregnancy burns.

Biologists from Monash University in Melbourne have discovered human pregnancy requires an astonishing 49,753 dietary calories. That’s the same as 104 McDonald’s Happy Meals or 218 Mars bars.

“Most of (the) energy that mammals put into reproduction is ‘boiled off’ as metabolic heat, only 10% ends up in the actual baby,” explained Dr Dustin Marshall, one of the study’s authors, in an interview with CNN.

He added:…