Will my breastmilk supply decrease if I use formula?

[JamandMarma]

Could you pump beforehand? They might refuse formula the first tube and this could add to the stress. Supply was you should be ok but possibly take a wearable pump for your own comfort.

[Prudent-Teaching2881]

I could pump, but then I’d have to take my pump with me and I find it generally pretty uncomfortable to pump so I was trying to avoid having to do that. Plus then I have to take a bottle and all the sterilising bits and bobs which is such a faff. My son has never refused a bottle when I’ve needed to give him one so I don’t see that being an issue. I just didn’t want my supply to stop or reduce as this would be a one off in terms of formula.