Tradition and verse — not medical advice
The Source
Shown in author's own English -- not a translation we made.
The sleep that flits on baby's eyes--does anybody know from where it comes? Yes, there is a rumour that it has its dwelling where, in the fairy village among shadows of the forest dimly lit with glow-worms, there hang two shy buds of enchantment. From there it comes to kiss baby's eyes.
The smile that flickers on baby's lips when he sleeps--does anybody know where it was born? Yes, there is a rumour that a young pale beam of a crescent moon touched the edge of a vanishing autumn cloud, and there the smile was first born in the dream of a dew-washed morning--the smile that flickers on baby's lips when he sleeps.
The sweet, soft freshness that blooms on baby's limbs--does anybody know where it was hidden so long? Yes, when the mother was a young girl it lay pervading her heart in tender and silent mystery of love--the sweet, soft freshness that has bloomed on baby's limbs.
In plain words (ours, not the poet's): three gentle guesses about where a sleeping baby's peaceful smile, soft skin, and drowsy eyes might really come from — dreamy, affectionate answers, not literal ones.
Why public domain: Tagore wrote The Crescent Moon in English himself, first published London 1913. US: pre-1929 publication, public domain in the US. Tagore died 1941; public domain in India (life + 60 years) since 2002.