Twelve plain-language guides on the Ferber sleep-training method, plus age and troubleshooting reference. From the team at Ferber.https://ferberapp.com/en-ushttps://ferberapp.com/guides/check-ins-explained/https://ferberapp.com/guides/check-ins-explained/What a Ferber check-in is, what to do during one, what to say, and the four things that turn a check-in into a sleep crutch you will then have to undo.Wed, 29 Apr 2026 00:00:00 GMTcheck-insmethodfirst-nighthttps://ferberapp.com/guides/co-parenting-and-consistency/https://ferberapp.com/guides/co-parenting-and-consistency/How two parents can run a Ferber arc cleanly, who does the check-ins, what to do across two homes, and how to handle the disagreement that always comes on Night 2.Wed, 29 Apr 2026 00:00:00 GMTco-parentingconsistencymethodhttps://ferberapp.com/guides/daycare-and-routine-changes/https://ferberapp.com/guides/daycare-and-routine-changes/How to plan a Ferber arc around a daycare-start, a holiday, a time-zone change, or a move. When to start, when to delay, and how to keep training during the change without making things worse.Wed, 29 Apr 2026 00:00:00 GMTroutinedaycaretravelplanninghttps://ferberapp.com/guides/early-morning-wakings/https://ferberapp.com/guides/early-morning-wakings/Why the 4:30 a.m. wake is the most stubborn problem in baby sleep, the four causes that explain almost all of them, and how to use Ferber to fix the right one.Wed, 29 Apr 2026 00:00:00 GMTtroubleshootingearly-morningnapsschedulehttps://ferberapp.com/guides/getting-started/https://ferberapp.com/guides/getting-started/A practical 10-minute primer that takes you from zero to ready-to-start. The age check, the gear list, what to tell anyone else in the house, and the exact protocol for Night 1.Wed, 29 Apr 2026 00:00:00 GMTgetting-startedfirst-nightprepmethodhttps://ferberapp.com/guides/handling-night-2-3-the-hard-middle/https://ferberapp.com/guides/handling-night-2-3-the-hard-middle/Why Night 2 is sometimes harder than Night 1, what an honest Night 3 looks like, and how to keep going through the part of the arc where most parents quit.Wed, 29 Apr 2026 00:00:00 GMTarcnight-2night-3expectationshttps://ferberapp.com/guides/sleep-regressions/https://ferberapp.com/guides/sleep-regressions/When the 8-month, 12-month, and 18-month regressions usually hit, what each one looks like, and how to use a short Ferber re-arc to come out the other side.Wed, 29 Apr 2026 00:00:00 GMTregressionstroubleshootingarchttps://ferberapp.com/guides/the-7-night-arc/https://ferberapp.com/guides/the-7-night-arc/What each of the seven nights actually looks like in practice. The intervals, the typical crying duration, the wakings, and the off-ramp at the end of the week.Wed, 29 Apr 2026 00:00:00 GMTarcexpectationsmethodhttps://ferberapp.com/guides/the-first-night/https://ferberapp.com/guides/the-first-night/A full walkthrough of Night 1 with the exact intervals, what to do at each check-in, and what to do if specific things happen during the wait.Wed, 29 Apr 2026 00:00:00 GMTfirst-nightmethodcheck-inshttps://ferberapp.com/guides/teething-and-illness/https://ferberapp.com/guides/teething-and-illness/How to tell teething from a real disruption, what fevers and colds mean for the arc, when to pause Ferber, and how to pick it back up cleanly.Wed, 29 Apr 2026 00:00:00 GMTtroubleshootingteethingillnesspausehttps://ferberapp.com/guides/the-three-night-turning-point/https://ferberapp.com/guides/the-three-night-turning-point/Why Ferber works in three nights for most families. The Night 3 mechanics, what to look for, and what it means if your turning point lands on Night 4 or 5 instead.Wed, 29 Apr 2026 00:00:00 GMTarcnight-3expectationsmethodhttps://ferberapp.com/guides/twins-and-multiples/https://ferberapp.com/guides/twins-and-multiples/How to run a Ferber arc with two or more babies in the same room. Same room or separate, who cries first, how to handle wakings, and a realistic estimate of how long the arc takes.Wed, 29 Apr 2026 00:00:00 GMTtwinsmultiplesplanning