12/10/2025
Denmark is moving away from the “cry it out” sleep training method, largely due to pressure from over 700 psychologists who signed an open letter citing harm to infant emotional development, leading the Danish board to reconsider its guidance, emphasizing responsive care and secure attachment as healthier alternatives.
Studies find consistently ignoring a crying baby can negatively impact their brain development, increase stress hormones like cortisol and can even affect their future emotional health.
Babies communicate their needs by crying, and ignoring these cries can lead to prolonged periods of stress, causing a rise in cortisol levels. Elevated cortisol levels can negatively impact brain development, brain structure and a baby’s ability to regulate stress even later in life.
Consistent responsiveness to a baby’s cries helps them develop a sense of security and trust in their caregivers. This can lead to a more secure attachment, which is crucial for emotional well-being, healthy social relationships and brain development.
Babies are not trying to manipulate their parents when they cry, they are communicating their needs and attempting to establish a connection. Responding to these cries is critical for building a strong bond and promoting healthy development.
