This Is Your Brain on sleep training baby
http://johnathanmixo177.tearosediner.net/10-compelling-reasons-why-you-need-baby-girl-travel-system
Generally, newborns sleep about 8 to 9 hours in the daytime and about 8 hours at night. But they may not sleep more than 1 to 2 hours at a time. Most babies don't start sleeping through the night (6 to 8 hours)