A knocked-out tooth, often from a fall or sports injury, can be frightening for both children and parents. Knowing what to do ...

Scientists showed for the first time that mothers from disadvantaged backgrounds with high prenatal levels of the stress hormone cortisol tend to have children whose first teeth come out earlier.

Illustration: Kelsea Petersen / The Athletic, with photos by Michael Martin and China Wong / Getty Images Patrick Brown is quick with a smile. As such, it does not take long to see that Brown has ...