An investigation into the effect of sleeping position on some aspects of early development.
D002657:Child Development; D004777:Environment; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009048:Motor Skills; D011187:Posture; D012890:Sleep; D006113:United Kingdom; D014481:United States; D014796:Visual Perception; D014851:Wakefulness