这个词是什么意思？
A course or method of action selected, usually by a government, to guide and determine present and future decisions on population control by limiting the number of children or controlling fertility, notably through family planning and contraception within the nuclear family.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D016656 · MeSH 2026。
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