After injury, estrogen may shield the brain
Inflammation goes down when the sex hormone increases around an injury
![Brain injury](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/11/bo_iStock_000046148780XXXLarge.jpg?fit=860%2C460&ssl=1)
HEAD CASE Brain injury can cause chronic inflammation that further harms delicate neural tissue. High levels of estrogen may be able to protect against this effect, a study in birds suggests.
KatarzynaBialasiewicz/istockphoto