Starkie C M, Crawford J S
Int J Gynaecol Obstet. 1976;14(6):559-60. doi: 10.1002/j.1879-3479.1976.tb00109.x.
A survey of 417 twin pregnancies is reported. Examination of the data revealed no difference in the incidence of pre-eclampsia referable to the zygosity of the twins. The findings thus lends no support to the hypothesis that immuno-incompatibility contributes to the aetiology of pre-eclampsia.