Fraternal twins (dizygotic twins are)

Double (separate) How does fraternal twins?
about one percent of all pregnancies are twin pregnancies. Two thirds of all twins are fraternal twins. Fraternal twins are the result of two sperm fertilize two eggs from the mother from the father they occur. Two fertilized egg (zygote) occurs, therefore dizygotic (freternal, biovu, non-identical, soraral) called twin. DI: two, Zygote: fertilized eggs means. Two babies thrive so as to form two separate zygotes individually. Genetic structure is different, as the two brothers born in different years, they are found only in the same womb at the same time.

How gender of fraternal twins?
they consist of two separate eggs and sperm as sex fraternal twins siblings born in different years may be the same or different. Both girls or both may be other boys but girls birsu most often men. Half of the Fraternal twins are born different gender in this way.
(Singleton pregnancies little difference in men (about 5%) is more than girls.)


twins, twin pregnancy
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similar or even identical twins?
Fraternal twins may resemble each other like brothers born in different years or may not resemble at all the same.

Factors that increase the chance of fraternal twins:
Fraternal twins formation is influenced by a number of factors and can vary between populations accordingly. Identical twins have the same frequency in each population and is not affected by any factors. Double (separate) affect the formation of some of the factors related to the mother of twins, it does not affect factors related to the father. Factors which promote formation fraternal twins are:
- It may vary between races, more than blacks.
- More common in women who gave birth too.
- The advanced maternal age increases the chances of fraternal twins.
- Before you gave birth to fraternal twins
- That gave birth to fraternal twins and the mother's family.
- Infertility medicines prescribed for the treatment, IVF treatment

Fingerprints will be the same?
Fraternal or identical twins fingerprints would not be the same.

Ultrasound images:
Fraternal twins are always two separate amniotic sacs in the (water pouch) thrive. Everything is different amniotic sac and chorionic membranes as different. In the uterus so they can not directly contact each other, the cord can not walk around to each other. (Dichorionic - diamniotic) placenta (feeding the baby, the baby's structure called his wife) is always different for the two infants and two.
Especially looking at the ultrasound examination of the shape and thickness of the membrane can be estimated to be between 11-14 weeks fraternal twins. If sex in later weeks of pregnancy are said to have followed different fraternal twins to be precise.