Our son is now 15 weeks old. I can't say I've seen a big change in our his behavior or sleep pattern just yet. We are only two weeks into Evivo and I do think his stool has become more solid and bm have been more consistent. I am not sure I can credit that to Evivo alone as we have added formula feedings into his diet in an effort to help him gain some weight. He is about 50% breastmilk and 50% formula. We do of course give him the Evivo mixed with the 3-5ml of breast milk each evening.