請看別人的研究結果，2萬個美國嬰兒的調查，他們的結論與你相悖。

順帶說一句，我自己也是受網友啟示（非常非常感謝），剛剛找到這個報道。

Baby's sleep position is the major factor in 'flat-headedness'
link:
http://www.sciencedaily.com/releases/2009/11/091119101211.htm

“Analyzing the largest database to date, more than 20,000 children, the ASU researchers found that the number of babies who have developed flat-headedness has dramatically increased since 1992. The increase coincides with the American Academy of Pediatrics launch of a "Back to Sleep" educational campaign that recommended parents place their infants on their backs to reduce the risk of Sudden Infant Death Syndrome.”