This observational study aims to monitor the vital sign changes in both mother and baby that occur during kangaroo care in preterm infants and to investigate any potential correlations between maternal measurement values and those of the infant. The purpose of this observational study is to look for a method to track the earliest responses that could, theoretically, be considered as 'social responses' in hopes of providing developmental interventions earlier to at-risk infants.

The goal of this observational study is to identify any signs of early "social response" in order to be able to assist infants that lack this response with early neurobehavioral modifications.

Inclusion Criteria:

• inborn at Mount Sinai
• gestational age between 30 0/7 weeks and 34 6/7 weeks gestation
• only one infant of a multiple gestation
• plan by family to do kangaroo care during NICU stay

Exclusion Criteria:

• outborn infants
• gestational age less that 29 6/7 weeks or greater than 35 0/7 weeks
• other infants of multiple gestation (see inclusion criteria)
• any major congenital anomalies
• sepsis and/or any other serious clinical complication precluding kangaroo care

Infants born at Mt. Sinai Hospital and admitted to the NICU. Preterm infants between 30 0/7 weeks gestational age to 34 6/7 weeks gestation age.