The goal of this single-centre longitudinal observational study is to create reference values for diastolic function parameters in neonates born at 35 weeks' gestation or above, and to assess the influence of pre-defined antenatal, intrapartum, maternal, and neonatal factors on cardiac function. The main question it aims to answer are: * What are the normal reference ranges for parameters of diastolic cardiac function in neonates? * How are these influenced by maternal, intrapartum and neonatal factors? * Do the diastolic changes noted during the first two days of life persist into infancy? Participants will have four echocardiographic assessments in total: * Two during the first 48 hours of life (prior to discharge home) * Two during infancy (as an outpatient)
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Reference values for diastolic function parameters in neonates
Timeframe: Day 1 and Day 2 of life
Persistence of diastolic function changes into infancy
Timeframe: 6 - 9 months of life, 12 - 18 months of life