I am curious to know when other babies started to sleep through the night...

Many of my friends at mothers group have babies that only just started to sleep through the night at 6 months, and I was the envy of them because Cooper was sleeping through from 8 weeks. Then at 4 months he started to wake up for a feed, and still does this, sometimes even twice a night (I am officially clueless as to why...I have tried EVERYTHING...)

SOO I would love to know when your baby started to sleep through the night without waking up for a feed (and would especially be interested to hear other Mums whos babies did sleep through, then started to wake up, and when they started to sleep through again.)

Thanks!!