The practice involves introducing evening primrose oil, derived from the seeds of the evening primrose plant, directly into the vaginal canal, with the intention of it being positioned near the opening of the uterus. Some individuals believe this method can help prepare the cervix for labor. The oil is thought to soften the cervical tissues, potentially aiding in dilation and effacement in the later stages of pregnancy.
Advocates suggest that the gamma-linolenic acid (GLA) found in evening primrose oil may contribute to prostaglandin production, which is known to play a role in cervical ripening and uterine contractions. Historically, evening primrose oil has been used for various medicinal purposes, and its application to assist with labor preparation has gained some popularity in certain circles. However, it’s crucial to acknowledge that scientific evidence supporting the efficacy and safety of this practice remains limited.