negative population growth (NPG) 人口负增长
zero population growth (ZPG) 人口零增长
natality 生育
family planning 计划生育
better natal and prenatal care and better upbringing 优生优育
fertility 生育能力
infertile; barren; sterile 无生育力
eugenics 优生学
talent; talented person 人才
talent bank; brain bank 人才库