This study examines if the internet-based peer support has an effect on the breastfeeding attitude or the duration of breastfeeding in preterm infants and their mothers compared with mothers with routine care. The factors associated with the initiation of breastfeeding in the neonatal intensive care unit will be determined. In addition, the perceptions of the mothers of preterm infants about their needs and problems when breastfeeding their preterm infants are described.

Inclusion Criteria:

• Mothers giving birth before full 35 gestational weeks in a study hospital

Exclusion Criteria:

• The mother not able to speak Finnish
• The infant's condition is critical (based on the paediatrician),
• The mother has a syndrome or illness preventing breastfeeding