Early Learning for Your Baby Begins at the Fetal Development Phase

"In that sense, using a prenatal audio system like the BabyPlus can help jumpstart auditory learning and bolster brain function at various prenatal development stages. A newborn child’s brain weighs around 12 ounces but increases to 2.2 pounds by the time he or she turns a year old. The extra weight comes from the additional brain mass which develops within 12 months to produce the neurons that will handle specific body functions and cognitive skills."
http://blog.babyplus.com/early-learning-baby-begins-fetal-development-phase/