This article describes a 1930s case study series involving dizygotic female twin infants. The twins’ development was evaluated following periods of intentionally restricted practice and minimal social stimulation. In the opinion of the author of the current article, the study is very unsettling and unacceptable, despite the lack of institutional review boards at that time. This discussion is followed by twin research reviews of recent papers concerning twin and non-twin intracytoplasmic sperm injection conceptions, the Emory University Twin Study of cardiac and brain functions, labor trials in multiple pregnancies after previous C-section delivery and cell-free DNA fetal fraction in twin pregnancies. The article concludes with news items of a twin survivor of Auschwitz, a situation in which twins traded places, the rare birth of identical twin foals, the novel delivery of co-twins in different decades and the Twins Ambulette Service.

中文翻译：

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双卵双胞胎婴儿：有争议的案例研究系列/双胞胎研究评论：双胞胎和非双胞胎 ICSI 概念；埃默里大学双胞胎研究；上次剖腹产后多胎妊娠的分娩；双胞胎妊娠中的无细胞 DNA 胎儿分数/新闻报道：奥斯威辛的双胞胎幸存者；双胞胎交易场所；相同的双马驹；不同年代出生的双胞胎；Twins Ambulette 服务

这篇文章描述了一个 1930 年代的案例研究系列，涉及双卵雌性双胞胎婴儿。在故意限制练习和最小的社会刺激之后评估双胞胎的发育。在当前文章的作者看来，尽管当时缺乏机构审查委员会，但这项研究非常令人不安和不可接受。本次讨论之后是对最近关于双胞胎和非双胞胎胞浆内精子注射概念、埃默里大学心脏和大脑功能双胞胎研究、先前剖宫产后多胎妊娠的分娩试验和无细胞 DNA 胎儿的双胞胎研究回顾双胎妊娠的比例。文章以奥斯威辛集中营双胞胎幸存者的新闻结束，双胞胎交换位置的情况，