The current state of knowledge reveals that the development of the brain of preterm infants is influenced by specific neonatal experiences during hospitalization, such as environmental sensory stimulation (light and noise), as well as physical and emotional proximity to mothers. However, there is a lack of evidence regarding the benefits that could be associated with the combination of care interventions to improve the health outcomes of preterm infants and their mothers, and in particular the development of the brain of infants during their hospitalization in the neonatal unit. The aim of this pilot study is to assess the feasibility and acceptability of a developmental care intervention including periods of nurturing between mothers and their infant (skin-to-skin contact and auditory stimulation) to promote physical and emotional proximity and a quiet period (controlled light and noise levels and olfactory stimulation in incubators) and to estimate the effect of this intervention on infants' neurodevelopment as well as on maternal stress and anxiety.

Inclusion Criteria:

Infants:

- born between 26 and 316/7 WGA.

Mothers

• agree to do 4 SSC sessions/week with a 15-minutes period of auditory (reading) stimulation;
• express breast milk for their infant;
• speak, read, or write French or English.

Nurses:

• have at least 6 months of work experience in a NICU;
• speak and read French or English.

Exclusion Criteria:

Infants:

• have birth defects or genetic disorders;
• have an intraventricular hemorrhage > grade II;
• receive nasal respiratory support;
• have been transferred from another hospital.

Mothers:

• are <18 years of age;
• had a multiparous birth;
• have a physical condition that does not allow SSC;
• abuse substances or alcohol;
• do not intend to breastfeed or give breastmilk.