Melnick M, Myrianthopoulos N C
Am J Med Genet. 1979;4(2):147-56. doi: 10.1002/ajmg.1320040207.
To determine the effects, if any, of chorion type on normal and abnormal developmental variation in monozygous (MZ) twins, we tested the hypothesis that disparate environments that are related to chorion type have no effect on this variation. The parameters studied included congenital anomalies and dermatoglyphics (total ridge count and right-left asymmetry). With the exception of total ridge count, analyses of these data failed to reject the null hypothesis. Dichorionic MZ twins had a significantly greater within-pair variation than monochorionic MZ twins for total ridge count. In summary, then, these data could offer little support to prior speculation that monochorial placenta may present less favorable environments for feta development.
为了确定绒毛膜类型对单卵（MZ）双胞胎正常和异常发育变异的影响（如果有），我们检验了以下假设：与绒毛膜类型相关的不同环境对这种变异没有影响。所研究的参数包括先天性异常和皮纹学（总嵴数和左右不对称性）。除总嵴数外，对这些数据的分析未能拒绝零假设。在总嵴数方面，双绒毛膜MZ双胞胎的同对内变异显著大于单绒毛膜MZ双胞胎。总之，这些数据几乎无法支持先前的推测，即单绒毛膜胎盘可能为胎儿发育提供不太有利的环境。
