Holding dolls do sleep is harmful to children?

Young children, holding the baby in bed at night phenomenon is not unusual, girls in particular, a common 2-5, but don\'t worry, it\'s only child from helpless infancy childhood moment of performance of the transition to independence.
2 year old child, began to have a clear understanding of the day and night, light and dark also learned to distinguish when children will close your eyes and bring them not feeling safe. So on bed lit a lamp, hand holding a doll, light ear listening to the mother humming songs and gently flapping movements will give children some sense of comfort, so that they can safely go to sleep.
Experts believe holding baby to sleep is only temporary in nature, when the children after the age of 6-7, this habit will automatically disappear, should be no children into adulthood will hold baby to sleep.