Sheets J W
Department of History and Anthropology, Central Missouri State University, Warrensburg.
Acta Genet Med Gemellol (Roma). 1987;36(3):349-53. doi: 10.1017/s0001566000006103.
Excessive twinning in an extended family of rural Missouri concentrates in the isolated generations of 1874-1930s. Moderate inbreeding, larger sibships to older mothers, and access to local doctors may have combined to enhance this familial twinning. These biosocial factors are similar to an isolated case of excessive twinning in Scotland.
密苏里州农村一个大家庭中过多的双胞胎现象集中在1874年至20世纪30年代的孤立几代人中。适度的近亲繁殖、年龄较大母亲生育的较大同胞兄弟姐妹数量以及当地医生的诊治可能共同促成了这种家族性双胞胎现象。这些生物社会因素与苏格兰一个过多双胞胎的孤立案例相似。
