While child care gurus claim that letting babies to cry it out is the best way of teaching the infants to soothe themselves, a new study has revealed that such a technique could be detrimental to the babies as they remain distressed even days after they learn to remain quiet about it.
Researchers at University of North Texas found that letting the babies cry themselves to sleep increases the levels of stress hormone cortisol and the hormone levels remained high for some days after they learnt to sleep by themselves.
Advertisement"Although the infants exhibited no behavioral cue that they were experiencing distress at the transition to sleep, they continued to experience high levels of physiological distress, as reflected in their cortisol scores", lead researcher Wendy Middlemiss said.
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