MSFinals-3981

A 35-year-old woman comes to the Emergency Department following a fall while decorating on a chair. She experienced intense pain in her hip immediately after the fall. X-rays show a fracture in the left neck of her femur. She has a history of seizures and takes topiramate. Her menstrual cycle is regular, and she is a non-smoker and non-vegetarian. She works as a landscaper. What is the probable cause of her fracture?