Distance from the skin to the lumbar epidural space in an obstetric population.
D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D001827:Body Height; D001835:Body Weight; D004824:Epidural Space / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008161:Lumbosacral Region / Q000033:anatomy & histology*; D009765:Obesity; D011247:Pregnancy; D013115:Spinal Canal / Q000033:anatomy & histology*