Methods: Baseline assessments of depression, anxiety, resiliency, perceived social support, pain catastrophising, and quantitative sensory testing (QST) will be undertaken. Baseline saliva samples will be collected for future genetic analysis. Throughout labor, pain will be assessed at high density and frequency by an electronic pain diary (mobile app developed by the study team), delivered at the bedside by a portable electronic device (Android tablet) provided by the study team. Labor variables will be recorded, including number of manual epidural supplemental doses, total dose of local anesthetic delivered, and the outcome of labor. Postpartum assessments will include depression, pain inventory, anxiety, perceived stress, maternal-infant bonding, breastfeeding, child development, and parenting self-efficacy.