If research evidence tells us how often painless birth occurs. How labor pain can be interpreted as positive or negative. How pain perception can be influenced by state of mind, environmental stress, and social support. About the complex relationship between pain relief and maternal satisfaction To learn more about the EBB Professional Membership, visit https://evidencebasedbirth.com/become-pro-member/ and visit EBB PDF library here:  http://evidencebasedbirthacademy.com/dashboard/pdf-library/