Effects of Auriculotheray in women during labor

INTERVENTION: E02.190.204 Experimental group: 33 women will receive auriculotherapy during labor with crystal microspheres, individually pressed for 1 minute or until cause pain tolerable for inducing stimulus. Placebo group: 33 women will receive auriculotherapy during labor with glass microspheres, without exerting pressure. Control group: 33 women will not receive auriculotherapy, only usual care unit. CONDITION: C10.597.617.515 F01.470.132 G08.686.785.760.769.326 Labor, Obstetric, Labor pain, Anxiety ; G08.686.785.760.769.326 ; C10.597.617.515 ; F01.470.132 O00‐O99 PRIMARY OUTCOME: Pain control according evolution of labor by visual analog scale (VAS) graded from 0 to 10, 0 for complete absence of pain and 10 being the worst pain experienced, assessed before, 30, 60 and 120 minutes of treatment. SECONDARY OUTCOME: Time of labor; delivery mode; Apgar in the first and fifth minute of the newborn; use of analgesics and analgesia; anxiety related the pain and evolution of labor through a validated scale (Hamilton Anxiety Rating Scale ‐ HAM‐A) before and 120 minutes of treatment. INCLUSION CRITERIA: 99 women in labor; 37 weeks gestation or more; single and cephalic fetus; cervical dilation greater than or equal to 4 cm; two or more contractions in 10 minutes; skin integrates the ear.