There is a lack of understanding of the persistence of elevated teen fertility rates in certain regions and countries, in contrast to the significant decline observed in other regions globally. This report considers fertility trends among 15‐ to 19‐year olds in the period 1950–2020 and explores potential driving factors behind the significant shifts that occurred over this period. The countries where teen fertility remains high are those with fast‐growing populations, primarily located in sub‐Saharan Africa. Countries with higher teen fertility are typically characterized by limited use of modern contraception, lower education levels, and early marriage. Sub‐Saharan Africa has emerged as the world region with the most teen births, increasing its proportion of global teen births from 12 percent in 1950 to 47 percent in 2020, a time during which this region's share of the global adolescent (15–19) population grew from 7.5 percent to 19 percent. By 2035, 67 percent of all teen births globally are projected to occur in this region. Consequently, the future number of births to teenage mothers will to a large extent depend on the development in sub‐Saharan Africa over the coming decades.

中文翻译：

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撒哈拉以南非洲地区青少年出生率的增加抵消了全球青少年生育率下降的影响


人们对某些地区和国家青少年生育率持续升高缺乏了解，而全球其他地区则出现显着下降。本报告考虑了 1950 年至 2020 年期间 15 至 19 岁人群的生育趋势，并探讨了这一时期发生的重大变化背后的潜在驱动因素。青少年生育率仍然较高的国家是人口快速增长的国家，主要位于撒哈拉以南非洲地区。青少年生育率较高的国家的典型特征是现代避孕措施使用有限、教育水平较低和早婚。撒哈拉以南非洲已成为世界上青少年出生人数最多的地区，其占全球青少年出生人数的比例从 1950 年的 12% 增加到 2020 年的 47%，在此期间，该地区占全球青少年出生人数的比例 (15-19)人口从 7.5% 增长到 19%。到 2035 年，预计全球 67% 的青少年出生将发生在该地区。因此，未来少女母亲的生育数量在很大程度上取决于撒哈拉以南非洲地区未来几十年的发展。