Use of lavender and lemongrass aromatherapy to reduce pain and anxiety during labor

INTERVENTION: This is a randomized, controlled, two‐arm, triple‐blind clinical trial. Experimental group: thirty‐five parturients will receive aromatherapy with lavender and lemongrass essential oils, administered through a personal necklace device, allowing continuous inhalation during labor. Control group: thirty‐five parturients will receive a placebo consisting of sweet almond oil, administered using the same device. The interventions will be initiated during the active phase of labor, with cervical dilation greater than or equal to five centimeters, and participants will be followed until the time of delivery. Randomization will be performed using a previously generated random sequence, with allocation concealment CONDITION: G08.686.784.769.326 Labor Pain; Anxiety ; Labor, Obstetric PRIMARY OUTCOME: It's expected to observe labor pain intensity. Pain intensity will be assessed using the Visual Analog Scale VAS, with scores ranging from zero to ten, where zero indicates no pain, one to three mild pain, four to seven moderate pain, and eight to ten severe pain. The assessment period will begin during the active phase of labor, characterized by cervical dilation greater than or equal to five centimeters and the presence of at least two effective contractions lasting greater than or equal to forty seconds, with measurements performed at three time points: before the intervention, twenty minutes after the intervention, and one hour after the intervention It's expected to observe maternal anxiety during labor. Anxiety will be assessed using the State‐Trait Anxiety Inventory State, with scores ranging from twenty to eighty points, classified as low anxiety from twenty to thirty nine points, moderate anxiety from forty to fifty nine points, and high anxiety from sixty to eighty points. The assessment period will begin during the active phase of labor, characterized by cervical dilation greater than or equal to five centimeters and the presence of at least two effective contractions lasting greater than or equal to forty seconds, with measurements performed at three time points: before the intervention, twenty minutes after the intervention, and one hour after the intervention INCLUSION CRITERIA: Women aged between eighteen and forty years, regardless of parity; term pregnancy between thirty seven weeks and forty one weeks and si Xdays, with a single, live fetus in cephalic presentation; active labor, defined by cervical dilation greater than or equal to five centimeters, confirmed by vaginal examination, and the presence of at least two effective uterine contractions lasting greater than or equal to forty seconds within ten minutes; pain score greater than or equal to four on the Visual Analog Scale VAS and anxiety level greater than or equal to thirty on the "State Trait Anxiety Inventory State" at the pre intervention moment; no language barriers that would prevent understanding of the Portuguese language SECONDARY OUTCOME: It's expected to observe adverse reactions to the intervention. Adverse reactions related to the intervention will be monitored throughout the study period using a structured form to record signs and symptoms reported by participants or observed by the research team, including nausea, headache, dizziness, allergic reactions, or any other discomfort. The assessment period will begin at the time of study enrollment and will continue until delivery It's expected to observe labor progression. Labor progression will be assessed using the cervical dilation rate in centimeters per hour. The assessment period will begin during the active phase of labor, characterized by cervical dilation greater than or equal to five centimeters and the presence of at least two effective contractions lasting greater than or equal to forty seconds, and will continue until the time of delivery It's expected to observe maternal satisfaction with the intervention. Satisfaction will be assessed using a structured questionnaire based on a five point Likert scale, where one indicates very dissatisfied, two dissatisfied, three neither satisfied nor dissatisfied, four satisfied, and five very satisfied. The assessment period will occur within twenty four hours after delivery