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1 sty 2020 · A closer look at the frequencies of the East Flanders Prospective Twin Survey (Derom and Derom, 2005), where genetic assessment of zygosity is nearly 100%, reveals that 44% of spontaneous twins are monozygotic, compared to 16% of spontaneous triplets. However, when one counts the number of zygotes that underwent splitting, one should also count ...
Twins, in rarer cases triplets, quadruplets (four), quintuplets (five), arising from a single fertilized ovum are termed monozygotic (MZ). The first identical quintuplets known to have survived their infancy were the Canadian Dionne quintuplets, all five of which survived to adulthood ( Fig. 3.1 ).
equally unexplained by the repulsion theory is the occurrence of monozygotic triplets, in which a subse-quent and distinct cellular differentiation event would have to occur in at least one of the resultant cell popu-lations at the same embryological state. Moreover, if such an event were to occur in both cell populations,
The processes that give rise to monozygotic (MZ) twins remain elusive. This article describes various theories of MZ twinning that have been examined over the years, although they continue to be speculative.
Conjoined twins are twins that are monozygotic (they originate from the same embryo) but are joined together by shared tissues and organs. Conjoined twins are extremely rare (about 1 in 100,000 births). There are two proposed mechanisms by which conjoined twins are thought to occur.
7 sty 2021 · We searched for pre-PGCS mutations in a single family consisting of monozygotic triplets and their offspring (not a part of the three-generation dataset described above).
birth. Twins, in rarer cases triplets, quadru-plets (four), quintuplets (ve), arising from a single fertilized ovum are termed mono-zygotic (MZ). The rst identical quintuplets known to have survived their infancy were the Canadian Dionne quintuplets, all ve of which survived to adulthood (. Fig. 3.1).
