Supply when baby sleeps longer at night?

[Fiddlesticks345]

Hi all! My DD is 10 weeks old.

For context:
I feed her at the breast every 2.5-3.5 hours through the day, kind of on demand

At around 10:30pm DP gives her a bottle of EBM while I express about 4oz total from both sides (he does this to bond with her and so he can settle her afterwards, also to make sure she doesn’t refuse bottles later on if I have to go back to work)

She wakes up between 2:30am and 4:30am and I feed her at the breast

She wakes up around 7:30am and I feed her at the breast

My question is: as there are now times during the night where there is between a 4 and 6 hour gap between either expressing or feeding, can my supply be adversely affected? I have toyed with the idea of setting an alarm and getting up to express at say 1:30am, but worry that if baby then wakes up at 2:30am I might not have enough milk for her to take a full feed? My breasts are very full when I feed at 2:30-4:30 and 7:30, but I am not in a lot of pain or anything.

Any help would be hugely appreciated!

I think with a 10 week old baby, your supply should be established and continuing to feed on demand will be absolutely fine. Are you expressing to build up a stash in your freezer or because you are worried about supply?

My understanding is that breastfeeding is supply and demand. If your baby doesn't feed for 6 hours (because she's asleep), you don't need a feed then, so your supply will regulate to stop you engorging /feeling uncomfortable. If she goes through a growth spurt and does need to feed through the night again, that's exactly what she will do and by feeding she will stimulate to be there for when she needs it. So I don't think you need to worry - feed on demand and it should sort itself out.

I’m expressing instead of giving DD the 10:30pm feed from the breast, partly for supply (so I don’t go from say 7:30pm until 2:30-4:30am without removing any milk) but also so that DP has EBM for the following night’s 10:30pm feed. If that makes sense?

@Fiddlesticks345

I’m expressing instead of giving DD the 10:30pm feed from the breast, partly for supply (so I don’t go from say 7:30pm until 2:30-4:30am without removing any milk) but also so that DP has EBM for the following night’s 10:30pm feed. If that makes sense?

That makes perfect sense.

It sounds like you are doing everything right.

Thanks so much both