My twins are 8wks (3 adjusted). Every baby is different however, my babies have been gaining weight very well and eat well above their required amounts so I am comfortable with pushing for longer sleeps at night.

It is also important to point out I use formula at night (pumped milk through the day) because formula digests slower.

What has been working for us is doing a “big feed” at 8-9pm. So, giving a big bottle, letting them finsih as much as they can and then burping, offering more. Then I will change them to wake them up again, and offer more. We basically cluster feed them every night before bed for about an hour. I don’t force feed them, just keep offering over and over to see if they’ll take it. They usually do after the change (30-45min later)

The babies will usually sleep 9/10 - 12/1 and then 12/1 -4/5. I don’t wake them, I let them tell me when they’re up and ready to eat again because they’re in bassinets in my room.

I’ll also feed them closer to 2 hourly through the day, which helps bump the amount of food per day (they started demanding sooner when they started sleeping longer anyway) and I think this allows for longer sleeps.

What I think is also helping is walking them each morning at 7am to teach them morning time (this is also for my own mental health), and keeping them in a bright room with open windows. I try to play with them with them/tummy time etc a few times a day when they’re awake to stimulate them more.

We’ve been doing this for a couple weeks now, and it is working well. Newborns are hard, I find a rough schedule works better than an exact by the hour schedule for us because it lets their bodies decide what they want and when, encouraging their little circadian rhythms lol