Let Your Baby Cry It Out -- Should You or Shouldn’t You? continued...
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.
If it's difficult for you stay away from your baby when she cries, going with this method may not be the best choice. Studies show that, even if parents make it through the first night or two, they usually find that enforcing sleep this way is too stressful. Many parents were not able to ignore their babies long enough or consistently enough for them to stop crying and eventually fall asleep on their own.