formula and milk supply

[beachavendrea]

Hi
My ds1 is 20 weeks old and has been ebf since birth apart from about 5 bottles he was given when I wasvery sick in the hospital.
At night he dosent sleep more than 1 4 hour stretch and then 2-1 hour blocks. I love breastfeeding him but after a lot of thought we have decided to give him a bottle if formula at his last night feed. I have been expressing in the mornings for about a week and giving him this at night and he did increase his sleep from 3 to 4 hours but it has got to the point where the lack of sleep is seriously effecting my mental state! He is such a big baby and doesn't feed for very long so I think he might just be a snacker.
Anyway my question is how do I introduce this bottle and still keep my milk supply up should I keep expressing in the mornings? Or should i express before i go to bed? I only get about 120mls out of one boob in the morning and about 60 out of the other one.
It might of course make no difference to his sleep and then I would go back to breast feeding this feed.

I could be wrong and I'm sure an expert will correct me if so, but at 20 weeks I think your supply is established so you could introduce a nighttime bottle for a few days to see if it helps sleep without having to do extra expressing and your supply will be ok.

If you then decided to continue with the FF at night your supply would adapt to reduce for the dropped feeds only, the supply for the daytime feeds should be fine.

Can anyone verify if this is correct or have I misunderstood how it all works?