I am returning to work (3 days a week) after Easter, DD2 will be 8.5 months. I am hoping to keep breastfeeding for as long as possible, and I know this will mean expressing probably twice a day. Through my experience in expressing, I think it may be unlikely that I'll have enough EBM to replace all the feeds while I'm at work. SO I'm curious whether other mums use a mixture of EBM and formula? If I use formula, I can be pretty sure DD would go 4 hours between feeds but I know with EBM she might only reach 3hours...so I'm not sure if I'll need 2 or 3 bottles. And of course, I won't want her carers giving her a bottle for at least 3 hours before I pick her up so I know she'll be hungry and feed from me properly.
Any observations or advice in similar situations?