The study compared 50 formula fed babies with 55 partially breastfed babies and 49 predominately breastfed babies from birth through 6 months of age.

• 这项研究将50个全奶粉喂养的宝宝与55个部分母乳喂养的宝宝，还有49个自出生以来就全母乳喂养的宝宝作比较。