Identical twins (monozygotic twins are)

How formed twins?
about one percent of all pregnancies are twin pregnancies. One-third of all twin pregnancies are twins. Identical twins (monozygotic twins, identical) are formed from the same mother as singleton pregnancies with an egg and a sperm from the father. Unite sperm and yummurt and fertilization occurs, one fertilized egg (zygote) occurs. Mono: A zygote: means the fertilized egg, so called monozygotic. So far, everything is the same as in singleton pregnancies. Fertilization is divided into two fertilized eggs after a period of time and begin to separate the two embryo development, it causes a division of twin pregnancy.

Are they twins are similar to each other all the time? How about sex?
Because identical twins name on due to dividing a single egg is the same as everything, including all genetic structures. Therefore, the images will be exactly the same every time. Sex is always the same. However, due to environmental factors identical twins living in different regions appear to have developed some different features. Different environmental characteristics, causes the activation of different dietary habits of different genes.

Twins rate does not vary between races and communities. Unlike the family like to have twins than fraternal twins affected by any factors.


twins, twin pregnancy
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Fingerprints will be the same?
Fingerprints of monozygotic or dizygotic twins would not be the same.

Ultrasound images:
placenta in identical twins (doll's wife) may be common to one or two separately. Amniotic sac that water sac in which the baby can be common or separate. It is that determines when the fertilized egg split.
- If there is a separate division within 3 days after fertilization and chorionic membrane of the amniotic sac occurs, double placenta (dichorionics, diamniotic, such as fraternal twins).
- If fertilization occurs between the division next 4-8 days placenta and chorionic layer would be one, two amniotic would (monochorionic diamniotic). The most common types are monochorionic diamniotic growth, 60-70% of monozygotic twins are like that.
- All cut division between 9-13 days regardless partners, both babies in the same pouch and grow to be one common placenta (monochorionic monoamniotic).
- The fertilized egg is then divided by 13. If the day happens condition called conjoined twins, conjoined twins are seen as the merger by the side of the body called the most parapagus. Except that the head region, the core region of the anus, may be in a stuck together in the chest.

Monoamniotic monochorionic twin pregnancies (mono-mono is called for short) accordingly intrauterine cord entanglement and high risk of loss.