Lower milk supply at night

Amy

Just wondering if anyone else has experienced this. I have a 1 week old that I am currently breast feeding and topping up with expressed milk as she was born early and small so gets tired breast feeding. When i express during the day I have no trouble expressing 2.5-3.0oz (60-90mls) but around 7 it drops to about 1oz (30mls). It's not really an issue I guess as I do have enough milk in the fridge for a few top ups and every day my little one is taking more and more from the breast but just wanted to know if its something anyone else is experiencing.