Headache following spinal anesthesia in obstetrics.
D000758:Anesthesia; D000775:Anesthesia, Spinal / Q000150:complications*; D000776:Anesthesiology; D006261:Headache / Q000209:etiology*; D009774:Obstetrics
ANESTHESIA, SPINAL/complications; HEADACHE/etiology and pathogenesis