Hi Jennifer. Kudos to you for pumping for so long. Your baby is lucky that you care so much about her getting breastmilk. I'm sorry I can't be more specific, but when I was pregnant with my first child, I remember reading about a study that was on the benefits of breastmilk. I don't remember all the specifics, but the study broke children down into three groups: breastmilk only, breastmilk and formula, and formula only. The babies who received no formula had the least health problems, BUT the children who received any breastmilk were significantly healthier than children who received no breastmilk. So, apparently any breastmilk is important to children. I wish I could tell you where to find that study, but I read that almost four years ago! Sorry. I hope you don't get discouraged. Good luck.