Term: a baby born between 37 weeks and 42 weeks gestation
Preterm: a baby born before 37 weeks of gestation
Post term/Postdate: a baby born after 42 weeks of gestation
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The neonatal period is a highly vulnerable time for an infant, who is completing many of the physiologic adjustments required for extrauterine existence.
The high neonatal morbidity and mortality rates attest to the fragility of life during this period.