阿比盖尔和布里坦妮·亨塞尔是一对联体双胎-是一单个卵子由于某种不明原因而未能使同卵双生完全分离的结果。在5万名孪生儿中只有1名生下来身体的某个部分与同胎儿相联;已知大约仅有500名这样的婴儿存活超过一年的,而今日在美国活着的不到12名(精确一样,她总让这对孪生姐妹自己选择:可以各做各的,也可合作剪一个。 Abigail and Brittany Hensel are a pair of twins - a single egg that failed to separate the identical twins for some unknown reason. Of the 50,000 twins, only one born part of the body is associated with the fetus; it is known that there are only about 500 such infants who survived for more than a year, and that less than 12 of them are living in the United States today ( Just as accurate, she always let the twin sisters choose for themselves: they can each do their own thing, or they can cut one together.