(...) On average men cry once every month; women cry at least five times per month. (...) In western countries such as Canada, the United Kingdom, and the United States, babies cry more often than infants in Eastern European countries. East Asian and Southeast Asian babies cry the most in the world, while African babies cry less than anywhere in the world. This is due to an intense amount of crying in the first three months after birth, with periods of crying peaking in the fifth week of age. It is unknown why this difference occurs culturally.^[15] A 2009 study found that babies mimic their parents' pitch contour. French infants wail on a rising note while the Germans favor a falling melody.^[16]