Because the median age of Africans is relatively low (e.g. in Uganda it is 15 years old) birth credits would have to limit fertility to one child per two women to reach the levels of developed countries immediately.
由于非洲中值年龄很低（如乌干达为15岁），若要立刻达到发达国家标准，生育信用得限制到每两位妇女生育一位宝宝。