Very young adolescents are more likely to experience complications during pregnancy and childbirth than adult women and are at greater risk of maternal-related death. The infants of adolescent mothers are at higher risk of mortality and morbidity. The adolescent fertility rate (births per 1000 women aged 15–19 years in 2010) was highest in the WHO African Region (114) and in low-income countries (111) compared with a global average of 49. In the WHO African Region, fertility is high at all ages and adolescent pregnancies are common. Adolescent fertility is declining in many countries but at a far slower rate than adult fertility.