Medicine
Hypoxemia
Oligohydramnios
Ductus arteriosus
Nitric oxide
Respiratory distress
Pulmonary hypertension
Pneumothorax
Extracorporeal membrane oxygenation
Necrotizing enterocolitis
Refractory (planetary science)
Anesthesia
Cardiology
Pediatrics
Pregnancy
Internal medicine
Surgery
Gestation
Physics
Biology
Astrobiology
Genetics