Higher Order Multiples
High orders of multiple births (three or more offspring in one birth) may result in a combination of fraternal (genetically different) and identical (genetically identical) siblings. The latter are also called super twins. For example, a set of triplets may consist of two identical siblings and one fraternal sibling. This happens when two eggs are fertilized and one of these subsequently divides into two fetuses. By analogy with monozygotic and dizygotic twins, such a combination is called dizygotic triplets. The Kübler triplets (see Elisabeth Kübler-Ross) were of this type.
Identical triplets or quadruplets are very rare and result when the original fertilized egg splits and then one of the resultant cells splits again (for triplets) or, even more rarely, a further split occurs (for quadruplets). Alternatively the original fertilized egg can split twice (to produce four embryos) and all four may survive, to produce identical quadruplets, or one of the embryos may not survive and result in triplets.
Read more about this topic: Multiple Births
Famous quotes containing the words higher, order and/or multiples:
“I remain just one thing, and one thing only—and that is a clown. It places me on a far higher plane than any politician.”
—Charlie Chaplin (1889–1977)
“You cannot have one well-bred man without a whole society of such. They keep each other up to any high point. Especially women;Mit requires a great many cultivated women,—saloons of bright, elegant, reading women, accustomed to ease and refinement, to spectacles, pictures, sculpture, poetry, and to elegant society, in order that you have one Madame de Staël.”
—Ralph Waldo Emerson (1803–1882)
“Just because multiples can turn to each other for companionship, and at times for comfort, don’t be fooled into thinking you’re not still vital to them. Don’t let or make multiples be parents as well as siblings to each other. . . . Parent interaction with infants and young children has everything to do with how those children develop on every level, including how they develop their identities.”
—Pamela Patrick Novotny (20th century)