Monochorion monoamniosic twins
Two children in one pregnancy – this is both a gift of fate, and a test, since it is more difficult to bear a multiple pregnancy even in its ideal flow than a single-child pregnancy.
Approximately 1 time for 80 pregnancies future mothers on the first examination on ultrasound learn that there will be two young ones (cases of more multiple pregnancy are much less common). Whether it is worthwhile for the expectant mother to fear for the health of babies and how high the risk of complications depends on the type of multiple pregnancy – twins are monozygotic (twins) and dizygotic, monochorionic and dichoric (bihorial), diamiotic (biamnotic) and monoamnotic.
Doubling by the number of fertilized eggs is divided into:
- Monozygotic – develops when a single fertilized egg is divided. With the rare exception of chromosomal abnormalities and artificial insemination, in this case, same-sex children with the same genotype are born, virtually indistinguishable from each other (twins).
- Dizygotic – is formed in the presence of two fertilized eggs. Children can be of the same sex or of different sexes, the genotype of each of them is unique (twins do not differ in similarity to those of brothers and sisters born at different times).