I have to go back to work for a week at the beginning of July. Lo will be 6 months on the 17th, so still taking Breastmilk. I have been expressing and freezing a supply, but haven't actually given her a bottle since she was two weeks old. How soon should I reintroduce it? I'm expressing at 8am at the moment. Was planning on expressing twice in June, freezing one and feeding her one. Would this affect my supply? When would you do the second express? How much milk do you think I should have frozen to last a week. I'm averaging about 120ml/5oz a day and currently have 24 bags.