新兴的硅谷初创企业正将多基因评分技术引入辅助生殖领域，使接受体外受精（IVF）的夫妇能够根据胚胎的遗传风险筛选乳腺癌和糖尿病等疾病，甚至预测身高、智商及外貌等非疾病特征。调查显示，约四分之三的美国人支持利用胚胎筛查预防遗传疾病，约三分之一的人支持筛选非疾病性状。随着投资增加推动试管婴儿成本下降，此类基因筛查服务预计将从针对富裕阶层的利基市场向更广泛的大众群体迅速普及。
尽管多数发达国家的医学和遗传学专业团体对其临床成熟度提出质疑，且英国等国严格限制非医疗因素的胚胎筛选，但全面禁止该技术并非明智之举。现阶段多基因评分提供的是统计学上的概率风险预测而非确定性结果，且由于基因数据库样本构成的原因，其对欧洲血统人群的预测准确度更高。2019年的一项研究指出，在10个胚胎中进行择优选择，可在理论上使孩子的身高增加1至6厘米，智商提高1至7分，随着基因数据库的扩充与AI算法的迭代，这些预测精度还将持续提升。
与其推行法律禁令，监管机构更应强化信息披露与透明度管理，强制企业如实向消费者阐明技术局限、相对风险与绝对风险的差异，并接受独立科学审查。将胚胎多基因筛查与早期优生学强权强制行为等同起来是不恰当的，因为它实质上是父母在知情权框架下自主寻求科学信息的过程。只要社会各界清醒认识到不存在绝对完美的基因组合，政府就不应阻碍家庭获取合法且充分披露的辅助生育决策数据。
Silicon Valley startups are pioneering polygenic embryo screening for in-vitro fertilisation (IVF) patients, evaluating genetic liabilities for conditions like diabetes and breast cancer alongside non-disease traits such as height and cognitive scores. Surveys indicate that three-quarters of Americans endorse screening embryos for medical risks, with roughly one-third backing non-disease trait selection. As expanding capital investment reduces IVF costs, polygenic testing is poised to transition from an exclusive luxury into widespread parental use.
Although mainstream medical societies caution that polygenic risk scores yield probabilistic ranges rather than binary certainties—with heightened accuracy currently skewed toward European ancestries—blanket bans are unjustified. Research from 2019 demonstrated that selecting among ten viable embryos could yield modest increases of 1-6cm in height and one to seven points in IQ using decade-old techniques. Rapid advancements in artificial intelligence and broader genomic datasets will steadily refine these trait predictions over time.
Policymakers should mandate transparent risk disclosure and independent scientific validation rather than imposing heavy-handed prohibitions. Voluntary embryo screening fundamentally differs from historic state-mandated eugenics, representing private choices within modern reproductive healthcare. Provided prospective parents receive clear guidance regarding the statistical limitations and genetic trade-offs, public institutions should allow informed access to advancing genomic insights.
Source: In praise of designer-ish babies
Subtitle: Couples should be allowed to select embryos on the basis of both disease resistance and IQ
Dateline: 8月 13, 2026 04:57 上午