Prior studies have demonstrated the impact of early maternal-driven intervention strategies on neurodevelopmental outcomes in preterm infants. Investigators have shown that interventions promoting the establishment of emotional connection between the infant and his or her mother, including mother/infant calming sessions with scent cloth exchange, vocal soothing, eye contact, and kangaroo care, can impact neurodevelopmental outcomes at 18 months. Investigators have also shown that 60 minutes of kangaroo care leads to decreasing levels of the stress hormone cortisol in both mothers and infants.