A YOUNG woman has shared how she is one of the rarest types of twins in the world. Hope Baxter and her sister, Faith, are known as Mo/Mo twins a term for monochorionic monoamniotic twins. These ...

Learn why identical twins are almost always the same sex, though they may be different genders. Although there are some rare exceptions, identical twins are almost always the same sex. Because ...

Identical twins are not as identical as previously assumed ... The new study focuses specifically on mutations that occur as or before embryos form from the mass ...

Between 2015 and 2016 the twins were part of a year-long mission to the International Space Station, with Scott spending the year in space and Mark on the ground functioning as the control group.

MZ twins are generally assumed to be genetically identical, although some genetic and epigenetic differences have now been described. A newly published finding that phenotypically concordant as ...