RESUMEN
Socioemotional development is central throughout life, and it unfolds in an interpersonal context in which each significant caregiver has an impact, particularly during infancy. However, only a relatively small number of studies have investigated associations between mothers and fathers' personality and emotional characteristics with their infant's socioemotional development during the perinatal period. Therefore, the present article examines the relationship between maternal and paternal personality traits and emotion regulation difficulties during the prenatal period with offspring's socioemotional development. This was a non-experimental and longitudinal study that included a community sample of 55 mother-father-baby triads. Parental assessments were carried out between the second and third trimester of pregnancy, and baby's socio-emotional development was assessed during their 2nd month after birth. Results evidenced differences between maternal and paternal personality traits and emotion regulation difficulties during the perinatal period as well as distinct contributions on infant's socioemotional development.