Youngest known mother in history

Amazing human fact:

Lina Medina was the world's youngest mother, who gave birth by cesarean section in Lima at age 5 1⁄2 (five and half years of age).

(Sources: http://content.time.com/time/magazine/article/0,9171,893791,00.html
http://www.telegraphindia.com/1020827/asp/foreign/story_1140311.asp)