One shot spinal is not a good solution for pain relief during labor.
Guedj
M P
MP
D015360:Analgesia, Epidural; D016362:Analgesia, Obstetrical; D000700:Analgesics / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D048949:Labor Pain / Q000188:drug therapy*; D011247:Pregnancy
D000700:Analgesics