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不久前,河北省农民王翠英在北京平安产下五胞胎,引起人们的广泛关注和浓厚兴趣。凡一次妊娠同时有两个或两个以上的胎儿,称为多胎妊娠,俗称多胞胎。其发生率一般按Hellin公式计算,即1:89n-1(n代表一次妊娠中的胎儿数);也就是说,每89次妊娠中有一次双胞胎,其他依此类推。实际上,多胞胎中绝大多数为双胞胎;三胞胎、四胞胎仅偶尔可以见到;而五胞胎则极为罕见,概率只有6千万分之一。从医学解释,造成多胞胎
Not long ago, Wang Cuiying, a farmer in Hebei Province, safely laid off five children in Beijing and aroused people’s widespread concern and interest. Where a pregnancy at the same time there are two or more fetuses, known as multiple pregnancy, commonly known as multiple births. The incidence is generally calculated by the Hellin formula, 1: 89 n-1 (n represents the number of fetuses in a single pregnancy); that is, there are twins in every 89 pregnancies and so on. In fact, the vast majority of multiple births are twins; triplets, quadruplets are only occasionally seen; and the fifths are extremely rare, with a probability of only one in 60 million. Explained from medicine, resulting in multiple births