The baby is almost five months old, recently a period of time the baby always sleep until the middle of the night will cry for a while, want to correct this habit of the baby, but I heard that the training of baby’s sleep habits also depends on the timing, then, when to start training better? How can I train my baby to develop good sleep habits? When does a baby start to develop sleep habits? 3-4 months old baby should start to cultivate good sleep habits. Circadian rhythms are well established when babies are 3 to 4 months old. There are regular naps during the day and long sleeps at night. They sleep an average of 14-15 hours per day. They usually sleep 3-4 naps during the day. Some babies sleep for up to 6 hours continuously at night. This is the time to start training your baby to establish a healthy sleep routine. Ways to establish a regular type of sleep and feeding: Mom can keep a diary of how her baby sleeps and feeds throughout the week so that she can get a clear picture of her baby’s eating and sleeping routine. Babies will throw tantrums and rub their eyes when they are fatigued, and mothers need to get their babies to sleep before they get tired. Pay special attention to the fact that once the mother sees those manifestations, it is too late to help fall asleep at that time and should be prepared 20 minutes in advance. A 3-month-old baby should develop the habit of falling asleep without a nipple. If the baby falls asleep while feeding, the mother should wake the baby and put him to bed when he wakes up to fall asleep again on his own, with the goal of separating eating and sleeping. As the baby matures, the baby can develop the habit of eating and sleeping separately. If the baby wakes up often at night, the mother can try to comfort the baby without breastfeeding. If breastfeeding, you can let dad comfort. If it’s been 4 hours between feedings, maybe it’s time to feed when you’re hungry. How can I train my baby to develop good sleep habits? Adhere to the following principles of sleep hygiene is conducive to the development of good sleep habits in children. 1, the sleep environment should be quieter and darker. 2, 3 months after the baby sleep their own crib, crib can be placed next to the adult bed. 3.Wake up and sleep time should be strictly defined to strengthen the cultivation of physiological rhythm cycle. 4, room temperature to maintain a comfortable level, should not be too hot and disrupt sleep. 5.You should avoid hunger when you go to sleep, and you should not drink too much water when you go to bed or during the night to avoid disturbing your sleep by urination. 6, to develop their own sleep habits, to avoid developing the bad habits of holding, patting, shaking or containing the nipple before bedtime sleep. 7, 1 to 2 hours before bedtime to avoid playing too excited. 8.Take a warm bath before bedtime, do infant massage is beneficial to sleep. 9, daytime naps should be appropriate, avoid long or frequent naps during the day.