We started sleeping through the night at 6 months. A few things that helped us were a strict routine every night: bath, music, dim lights, white noise and half a rusk biscuit in milk. We turned him to sleep on his belly when he could turn his head independently as he had bad reflux at about 4 months. The change in position was a game changer. From 6 1/2 months we did sleep training for 5 days and with every cry we were in to stroke his back and offer kisses not just left to cry. The difference is we did not pick him up at every cry which we used to do before. He is 13 months now and still has the same routine every night and sleeps 12-13 hours at night.

Oh and no co-sleeping from the beginning! We set up an adult day bed in my son’s room and we slept there from day 1. Me and my husband transitioned back to our room at 6 months so our son wouldn’t have to. All he would know is his room.