Carmen Arteaga, 28, gives birth inside the childbirth unit at hospital Escuela in Tegucigalpa October 21, 2011. According to Honduras' health authorities, about 220,000 babies are born in Honduras each year and the cost of having a baby delivered at the public hospital is $10. The world's population will reach seven billion on October 31, according to projections by the United Nations. Picture taken October 21, 2011. REUTERS/Edgard Garrido (HONDURAS - Tags: HEALTH SOCIETY)