Difference in twins of opposite sexUploader: Gideon 17 days ago Subscribe 1046
One fetus acts as a parasite towards the other. Keith; Emile Papierik; Donald M. The zygote splits into two within a few days after fertilization. Women undergoing certain fertility treatments may have a greater chance of dizygotic multiple births. This epigenetic modification is triggered by environmental events. Monozygotic twins, although genetically very similar, are not genetically exactly the same. The vast majority of twins are either dizygotic fraternal or monozygotic identical. Another term to describe what some people call "twin talk" is cryptophasia where a language is developed by twins that only they can understand. If they occur early in fetal development, they will be present in a very large proportion of body cells.