with my daughter Aria (from the age of 5 days) would have her last bottle feed at 10-11pm and would sleep until 6-7am the next morning. She missed a feed during the night but HV said it was alright as she was gaining weight etc and just to let baby sleep. I don't think i could of hit it luckier as i love my sleep and that was the only part i was dreading the night time feeding. My wee girl is still a good sleeper going to bed around 7-8pm and normally wakes up the odd occasion during night but sleeps the 12 hours of the clock, i found the best way to encourage her to sleep longer was a routine, ie, a wee kick about (lying on her mat bare bummed!) around 9pm then a bath, changed wee cuddle bottle and put down to bed. I did this right up until she started solids at around 4months x