Epstein pearls are small, white bumps that form in a baby’s mouth before they're born. Learn more about them, including how they're diagnosed and treated. Medically reviewed by Wendy L. Hunter, M.D.

Mollusks maintain the symmetry of their pearls by adjusting the thickness of each layer of shimmering nacre. If one layer of the pearl’s nacre is thinner, the next layer is thicker and will balance ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment. Rachael has a degree in Zoology from the ...