I breastfeed my babies until now,they are twins ,27 weeks.
At the beginning,they stayed in hospital,i totally pump out for them,after they went back home,i start to feed directly and pump out to feed. Normally,I will let them drink as much as they lcan until they feel tired,then use the previous pump milk to feed, at the beginning,i gave a round 100ml and estimate them to drink 60ml. Normally,they can finiish You can adjust if she can finish or not. Also,if you want him/her gain weight more stable,i will suggest you not using feed on demand method,it is difficult to control and don't know how much bb drunk. Once I tried feed on demand,my babies start lossing weight. Following 3hrs/4hrs to feed once will be better for them. Even thought people said that will have less milk to express, for me, i will suggest feed on schdule and then pump out the milk to feed. Make sure they drink enough.