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They are called: fraternal or dizygotic twins.

Twins who develop in one amniotic sac are called identical or monozygotic twins.

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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.


Thin transparent membrane that separated a pair twins in utri is an indicator following modes of twinning?

The thin transparent membrane that separates a pair of twins in utero is typically indicative of diamniotic, monochorionic twinning. This means that the twins each have their own amniotic sac but share a single chorion. Twins that have separate chorions and amniotic sacs are known as dichorionic, diamniotic twins.


Does 2 sacs and one placenta mean fraternal twins?

I am pretty sure because that is how my twins are at the moment that one placenta and two sacs mean identical twins more often than fraternal and more often identical if they are the same sex


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.


Do twins need to be in the same sac to be identical?

No, identical twins can be in the same or separate sacs. Identical twins form when a single fertilized egg splits into two embryos. Whether they share the same sac or have separate sacs is determined by when the split occurs during development.

Related Questions

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.


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.


Can a woman have 2 amniotic sacs?

Yes, a woman can have two amniotic sacs, which typically occurs in the case of a multiple pregnancy, such as twins. Each fetus can develop in its own amniotic sac, a condition known as dichorionic-diamniotic twins. This situation allows each fetus to have its own space and fluid, reducing the risk of complications associated with shared sacs. However, not all twins will have separate sacs; some may share one, leading to different classifications of twin pregnancies.


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.


In the case of twins, is it common for them to have two separate sacs?

Yes, it is common for twins to have two separate sacs in a pregnancy, known as dichorionic diamniotic twins.


Thin transparent membrane that separated a pair twins in utri is an indicator following modes of twinning?

The thin transparent membrane that separates a pair of twins in utero is typically indicative of diamniotic, monochorionic twinning. This means that the twins each have their own amniotic sac but share a single chorion. Twins that have separate chorions and amniotic sacs are known as dichorionic, diamniotic twins.


If you have twins in separate yolk sacs is this good?

yes


Does 2 sacs and one placenta mean fraternal twins?

I am pretty sure because that is how my twins are at the moment that one placenta and two sacs mean identical twins more often than fraternal and more often identical if they are the same sex


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).


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.


How does the development of twins with two sacs and one placenta differ from twins with separate placentas?

Twins with two sacs and one placenta, known as monochorionic diamniotic twins, share a placenta but have separate sacs. This type of twin development carries a higher risk of complications compared to twins with separate placentas, known as dichorionic diamniotic twins. The shared placenta in monochorionic twins can lead to potential issues such as unequal sharing of nutrients and blood flow, which may require closer monitoring and medical intervention during pregnancy.


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.