3 weeks old sleep time

[MumApr18]

Hello! My DS is now 3 weeks and 2 days and had his last feed at 4.30am and is still sleeping! He was under birth weight for a while but it now well over it (birth weight was 7lbs 5 and he is now 8lbs 9). It would suit our plans for the day greatly if I could let him sleep on until about 10am before waking him for a feed, if he doesn't wake before! What do you think? Too long?

Do it. No point waking a sleepy baby if they are I've birth weight

I think one sleep of 6 hours is fine at that age for a healthy baby so long as he makes up for it by feeding frequently the rest of the time.
One of mine slept about 8 hours from 6 weeks but fed every 2 hours the rest of the day so still had about 8-10 feeds a day.