There is a lot of pressure on women to breastfeed. Formula has all the nutrition of breastmilk. The well-being of both the mother and the baby must be considered. By Gail Erlick Robinson, MD Mary, three weeks postpartum after a normal delivery and having a healthy baby, is struggling with low mood. She has insomnia and finds it difficult to fall asleep, even when her baby is sleeping. She has lost her appetite and is unintentionally losing weight.