antibiotic agent; biological marker; C reactive protein; D dimer; dexamethasone; ferritin; furosemide; immunoglobulin; immunoglobulin G antibody; infusion fluid; prednisolone; abdominal distension; abdominal radiography; artificial ventilation; bilious vomiting; blood pressure; case report; cesarean section; clinical article; coronavirus disease 2019; decompression surgery; echocardiography; extubation; female; gestational age; heart disease; heart ejection fraction; heart left right shunt; heart rate; heart ventricle function; hospital discharge; human; hypotension; inferior cava vein; inotropism; lactate dehydrogenase blood level; leukocytosis; medical history; necrotizing enterocolitis; neonatal intensive care unit; neonatal multisystem inflammatory syndrome; neutrophil; neutrophilic inflammation; newborn; note; patent ductus arteriosus; pediatric multisystem inflammatory syndrome; placenta previa; pneumatosis intestinalis; premature labor; prematurity; systolic heart murmur; tachycardia; transient tachypnea of the newborn