Researchers at Harvard Medical School recently released a paper in the Journal of Obstetrics and Gynecology that found the average birth weight in American newborns has dropped by two ounces. The study looked at babies born between 1990 and 2005 and noted that this was the first decline in average birth weight since the 1950s. Additionally, the study found a decrease in the number of large babies born. This is seen as a positive because it leads to fewer instances of birth trauma. A decrease in the number of babies born over the 90th percentile also reduces the occurrence of serious birth injuries that can lead to lifelong health conditions, such as cerebral palsy. Follow the link to read more about this birth weight study.