The oil has the effects of being an anti-depressive, anti-septic, anti-spasmodic, enhancer of sexual desire, and a mild sedative (2). The limonene found in the C. aurantium oil controls cyclooxygenase I and II, prevents prostaglandin activity and reduces pain (21). Although aromatherapy using other herbs has shown effects on the method on labor pain reduction, there is inadequate evidence based on clinical trials that have focused on the effects of C. aurantium on labor pain. Recognizing its sedative and pain-reducing effects the researchers focused on the effects of C. aurantium oil on labor pain reduction as an adjunct to midwives’ role in reducing labor pain and the increased interest in the use of pain-reduction methods with fewer side effects for mother and the fetus.