Neonatal and newborn radiation shields for the "jewels."
As a cardiologist and cardiac electrophysiologist who gets way too much radiation, I can appreciate their importance and loved their shape. But it wasn't until I read their instructions for use that I realized why their shaped that way. It seems the shape is used differently for boys vs. girls.
Cool. You learn something new every day.
Reference: More info from SavetheGonads.com.