Introduction Natural birth, or unmedicated childbirth, represents a profound and intricate biological process. For this reason, it will also be referred to as physiologic birth in this article.  The American College of Obstetricians and Gynecologists (ACOG) formally defines physiologic birth as "spontaneous labor and birth at term without the use of pharmacologic and/or mechanical interventions for labor stimulation or pain management throughout labor and birth". 1  This defi