I breast feed my baby for 8 weeks and then switched to formula once I went back to work. I wanted to share this because I know a lot of women get judged for using formula. I saw this insight on Glow Baby: Day 168. Formula feeding tips and insights. Some interesting research: A study at Ohio State University compared health, intellect, vocabulary asthma, hyperactivity, and other traits between almost 2,000 pairs of siblings—one of whom was breastfed, the other given formula—no statistically significant differences between the two sets of babies were found.