Hello everyone - my sister has been breastfeeding exclusively since baby born at 8lbs 8oz on dec 19 but he is still only 8lbs and has actually lost weight in last few days. Midwife says not enough milk - but she can express really easily - 4oz in 10 mins. Also, baby filling nappies and has milk in mouth after feeding. But he is feeding for up to 90 mins at a time and still hungry. Sister exhausted and midwife threatening formula next visit. But what if doesn't gain with formula - then have given up breastfeeding for nothing. Is all breastmilk same in calorie/nutrient terms? Am struggling to help her as my two girls have both doubled birthweight before 10 weeks with exclusive breastfeeding. Any advice/thoughts/experience much appreciated. xxxx