Exclusive breastfeeding and maternal postnatal anxiety contributed to infants' temperament issues at 6 months of age The World Health Organization recommends exclusive breastfeeding for at least 6 months for health reasons, and it could be associated with better infant development outcomes that continue into childhood and adolescence.1 Temperamental-based behavioural traits and maternal anxiety are well-known key contributors to infants' cognitive and developmental outcomes.2 However, studies have disagreed on associations between exclusive breastfeeding and infants' temperament. The cohort was drawn from the Italian Measuring the Outcomes of Maternal COVID-19-related Prenatal Exposure study.5 Data on 320 mother-infant dyads were collected from 10 neonatal units in northern Italy from May 2020 to August 2021. [Extracted from the article]