Hi Sheng, mine just hit 3 months. He's taking 150ml to 165ml (formula milk) every 3 hours. He only wakes up once a night. Sometimes he sleep throughout. The nurses told me that breast milk is easier to digest. So mabybe you can switch to formula for the last night feed? If not you try stretching to 4 hours. My #1 was feeding every 3 hours throughout day and night. Was a difficult time for me. There's old saying of just feeding them water at night if they wake up for milk. This is to train them and let them know that no milk will be given and they have to sleep. I have not't try this method. Maybe you can try? Heard it will be difficult for the baby for 1 week and it will be all over.