... often have health consequence to the babies, twins
birth are more often handled with special ... showTocToggle("show","hide")
1 Types of twins
1.1 Fraternal twins
... identical individuals are produced by accident (as with identical twins
), but in common parlance the clone is an identical copy by some conscious ... deadly diseases. It should be noted that natural clones occur - identical twins
Cloning extinct species
Cloning, or more precisely, the ...
... from simple measurement of physical characteristics to the more ghastly experiments carried out by Josef Mengele for Otmar von Verschuer on twins
in the concentration camps. During the 1930s and 1940s the Nazi regime forcibly sterilized hundreds of thousands of people who they viewed as ...
... at the stage at which embryonic stem cells would be extracted is still young enough to be able to divide into two embryos, making identical twins
, or in rare cases, merge with another blastocyst, even one of the opposite sex  , to create a chimera , an individual comprised of populations ...
... become an embryo . Other organisms may undergo meiotic cell division at this time (for more information refer to biological life cycles ).
and multiple births can be monozygotic (identical) or dizygotic (fraternal).
Zygote intrafallopian transfer