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How Do Fraternal Twins Occur and Identical Twins Occur?
Fraternal twins (dizygotic twins) are simply two fertilized eggs that are implanted in the uterus at the same time. Identical twins (monozygotic twins) is one fertilized egg that separates into two embryos. In most cases, identical twins share one placenta, but have separate amniotic sacs. In some cases, they have two placentas. In rare cases, they share both the placenta and the amniotic sac.
How do twins look exactly alike?
They do look different! Even identical twins, with identical DNA, are different. Most have a slight difference in height and weight. Many people have a difficult time telling them apart because they are focusing on the wrong things. If someone looks only at the hair, they may not see that their faces are slightly different.
Why would you have two amniotic sacs?
Having two amniotic sacs, known as a "double" or "dual" amniotic sac, can occur when a woman is pregnant with multiples (e.g., twins). Each fetus typically develops its own amniotic sac. This situation is more common in dizygotic (fraternal) twins than in monozygotic (identical) twins.
How are sets of identical twins made?
Identical twins, or monozygotic twins are formed from one zygote. This is usually a result of damage to the embryo that causes it to split into two. If both halves are big enough to survive and the split has happened early enough on then two badies sharing one amniotic sac, one placenta and the same DNA will be born.
Do identical twins have the same umbilical cords?
Fraternal twins each have their own umbilical cord, just like they have their own sac. The two of them are just the same as two siblings with the same birth date.
Do identical twins share a sac during pregnancy?
Identical twins do not share a sac during pregnancy. They each have their own amniotic sac and placenta.
Do identical twins share the same amniotic sac?
It can be either. Sometimes they are in their own individual sac, and in other instances they share one amniotic sac.
Do twins have one amniotic sack or two?
If you mean identical twins, they can be in one sac (1) or each in their own sac (2). As for fraternal twins, they each have their own sacs (2).
If you are an identical twin do you share a bag of fluid inside the mothers womb?
That depends on the type of twins. Fraternal twins usually have separate amniotic sacs. Identical twins usually share the amniotic sac.
Can twins share the same sac during pregnancy?
Yes, twins can share the same sac during pregnancy, a condition known as monochorionic monoamniotic twins. This occurs when the twins develop from a single fertilized egg and share both the placenta and the amniotic sac.
What is the genetic difference between identical and non identical twins?
Identical twins are formed by the separation of the same embryo containing same genetic coding. thus the the twins are identical as formed from the same embryo. But this is not the case in the non-identical twins as they are formed from the individual embro each having different genetic coding.
What is monochromatic twins?
Probably a misunderstanding. Monochromatic would mean "only one color", which doesn't make much sense WRT twins. You're probably after monoZYGOTIC, which is another word for identical twins.
How Do Fraternal Twins Occur and Identical Twins Occur?
Fraternal twins (dizygotic twins) are simply two fertilized eggs that are implanted in the uterus at the same time. Identical twins (monozygotic twins) is one fertilized egg that separates into two embryos. In most cases, identical twins share one placenta, but have separate amniotic sacs. In some cases, they have two placentas. In rare cases, they share both the placenta and the amniotic sac.
Can identical twins have separate sacs and placentas?
Yes, identical twins can have separate sacs and placentas, which is known as dichorionic-diamniotic twins. This occurs when the fertilized egg splits into two embryos early in development, resulting in each twin having its own sac and placenta.
I'm pregnant with twins. How do I know if I'm having identical or fraternal twins?
The ultrasound can determine if they are fraternal or identical. If they are identical then they will share a placenta and they may even share an amniotic sac. If they are fraternal they will have separate placentas. Sometimes it is difficult to see because of the membrane but the ultrasound is sophisticated and they normally can tell.
''A single gestational sac containing a twin intrauterine pregnancy was demonstrated monoamniotic monochorionic twin pregnancy'' what does all this mean?
The amnion and the chorion are the two layers of the "bag of waters." What this means is that there are two babies (identical twins) in one sac. This is pretty rare and complications often arise. Usually twin babies do not share both sets of membranes. Fraternal twins never share a sac, and identical twins only do sometimes and then it is usually only the outer layer that they share. They still have separate inner sacs. In this case the babies are in the same bag of waters without the inner membrane separating them.
How do twins look exactly alike?
They do look different! Even identical twins, with identical DNA, are different. Most have a slight difference in height and weight. Many people have a difficult time telling them apart because they are focusing on the wrong things. If someone looks only at the hair, they may not see that their faces are slightly different.
