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Adopting this method might be difficult during the first few nights. But you’ll likely see improvement in your baby's sleep pattern by day 3 or 4. Most parents see an improvement within a week.

Tip: If you want to try the Ferber Method, make sure you're well rested before the first night of sleep training. For the first nights especially, you'll spend a lot of time listening for your baby's cries, checking your watch, and entering and exiting her room.