With the help of CGI and personal stories, this three-part series documents the minute-by-minute process of human gestation, from conception to birth. Each episode looks inside the womb to re-create the growth process of a fetus, illustrating how a fertilized egg acquires traits that ultimately lead to the creation of a unique individual. The series also explains how certain unexpected mutations can occur during the growth process. One story focuses on a family whose multigenerational genetic mutation causes half of the members to grow six digits on each hand.