Posted by spbg35 on March 01, 2007 at 22:01:08:My little man starting sleeping through the night at about 4 months, by about five months he was sleeping 12-13 hours a night. All of a sudden he is waking after about 7-8 hours of sleep which isn't bad just not what he has been doing for the past 4 months. Any suggestions on what would be the cause of this or what I should try to get him back on schedule.