In 1939, Lina Medina of Peru became the youngest mother in history when she gave birth to a healthy baby boy at just the age of five years, seven months, and 21 days. Based on the medical assessments of her pregnancy, she was less than five years old when she became pregnant, which was possible due to precocious puberty. What is precocious puberty? A precocious puberty  is a rare genetic condition which causes a child’s body to change into that of an adult too soon (before age eight for girls and before age nine for boys). Boys with this condition will often experience a deepening voice, enlarged genitals, and facial…