He created a "uterus" from a football bladder by punching a couple of holes in it, and filling it with goat's blood. A former classmate, a butcher, would ring his bicycle bell outside the house whenever he was going to kill a goat. Muruganantham would collect the blood and mix in an additive he got from another friend at a blood bank to prevent it clotting too quickly - but it didn't stop the smell.
He walked, cycled and ran with the football bladder under his traditional clothes, constantly pumping blood out to test his sanitary pad's absorption rates. Everyone thought he'd gone mad.