Parity, prolonged labor and epidural analgesia.
Witter
F R
FR
Caulfield
L E
LE
D015360:Analgesia, Epidural; D016362:Analgesia, Obstetrical; D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications; D010298:Parity; D011247:Pregnancy; D013997:Time Factors