I think ds1 (2hrly night wake ups at 5.5mths) started to settle down with the waking around 18mths (give or take a bit); eventually down to around 1 feed a night around 20mths. Soon after turning 2 started consistently sleeping through. I breastfed until 26mths. I did get exhausted early on but took to having nanna naps on the weekend to try and catch up on some sleep (was working full time as a teacher when ds turned 4mths) eventually I got used to the less sleep (used to need 9hrs sleep/night; now I function on 6-7hrs of semi broken sleep). I sent DH in to settle ds1 from around 2yrs.