Massage and singing: which helps preemies develop better?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. For premature infants: birth between 30 and 34 weeks of gestation plus 6 days, and weighing more than 1800 g at the start of the trial. 2. For full-term infants: pregnancy and birth without complications at or after 37 weeks of gestation, with an Apgar score ≥7 at 10 minutes after birth. 3. For parents or legal guardians: * Parents over the age of 18 * Parent agreeing to be filmed with their infant (parent who will be responsible for the treatment) * Parents capable of understanding the information document * Parent affiliated with or beneficiary of the French social security system * Parents who have been informed and have freely given their informed written consent no later than the day of inclusion. Exclusion Criteria: 1. For premature infants: * Birth before 30 weeks of gestation * Weight less than 1800 g at the start of the trial * Morbidities related to prematurity (necrotizing enterocolitis, cerebral parenchymal damage, stage III and IV intraventricular hemorrhages) * Presence of a congenital malformation or chromosomal abnormality * Known sensory, motor, or central nervous system impairment * Patient receiving non-invasive ventilation at 34 weeks gestational age (CPAP and high-flow nasal cannula) 2. For full-term infants: * Birth before 37 weeks gestation * Birth with complications 3. For the parent providing the treatment and the infant: * Presence of a known sensory, motor, or central nervous system impairment * Presence of a congenital condition * Presence of psychological distress in the parent 4. For both parents: * Under guardianship, conservatorship, or legal protection * Situation of extreme psychosocial instability and/or mention of domestic and/or intra-family violence * Illicit drug or alcohol use by the mother during the perinatal period * Participant is in another study with an ongoing exclusion period during inclusion * Involuntary hospitalization