Identical twins come from one ovum, which, after fertilization, divides in two and develops into two separate individuals. Fraternal, or dizygotic, twins occur when the mother produces two eggs in one monthly cycle and both eggs are fertilized.
Monozygotic twins can develop differently, due to different genes being activated.
More unusual are "semi-identical twins".
What causes identical twins or monozygotic twins? Find out the chances of
having identical twins and the risks involved. Huggies.com.au.
www.ask.com/youtube?q=How Are Identical Twins Made?&v=sOBvRhXIJN4
Nov 6, 2013 ... Identical Twin Formation-First time ever witnessed The Cleavage of a ... IN THE
WOMB DURING PREGNANCY - How TWINS are made?
To form identical twins, one fertilised egg (ovum) splits and develops two babies
... The self-contained halves then develop into two babies, with exactly the same
With identical twins, one egg (zygote) from the mother is fertilized by one sperm ...
they may develop separate placentas (chorion) and separate sacs (amnion).
May 9, 2001 ... How eggs split to form identical twins Q: In the case of identical twins, what
triggers a single ... This is the stuff that an embryo will develop from.
Nonidentical twins occur when a woman produces two separate eggs that are
then fertilized by two different sperm cells. The resulting twins sometimes look ...
Identical twins look almost exactly alike and share the exact same genes. Most
identical twins happen by chance.
Jul 5, 2007 ... LYON, France – Scientists proposed a new theory this week for how identical
twins are formed as embryos, in a discovery that may improve a ...