A poster used to educate girls about menstruation and female reproductive system is seen on February 21, 2015 at the Madibane High School in Soweto, a district of Johannesburg. As sanitary pads are too expensive for many teenagers in Africa, NGOs try to find solutions and local products are made. AFP PHOTO/STEFAN HEUNIS        (Photo credit should read STEFAN HEUNIS/AFP/Getty Images)