Question

how many type of twins and which are they​

Answer 1

Answer:

There are two types of twins – identical (monozygotic) and fraternal (dizygotic). To form identical twins, one fertilised egg (ovum) splits and develops two babies with exactly the same genetic information.

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Answer 2

Types of Twins:-

Fraternal twins

Fraternal twins are formed from the fertilisation of two eggs by two different sperm. They are also known as ‘dizygotic twins’, or ‘non-identical twins’.

With fraternal twins, the two foetuses (developing babies) each have a separate placenta, inner membrane (the amnion) and outer membrane (the chorion). They don’t usually look identical and might or might not be the same sex.

Identical twins

Identical twins are formed from the splitting of one embryo. They are also known as ‘monozygotic twins’.

There are different types of identical twins, depending on what they share in the womb.

• Almost one third of identical twins have their own placenta, inner membrane, and outer membrane. The medical term for these twins is ‘dichorionic diamniotic’ or DCDA twins.
• Almost two-thirds of identical twins share the same placenta and chorion, but have their own amnion. These are ‘monochorionic diamniotic’ or MCDA twins.
• The rest — only about 4% of identical twins — share everything, and are called ‘monochorionic monoamniotic’ (MCMA) twins.

Although identical twins are the same sex and are genetically identical, they can develop quite different personalities. You can find a good description of the different types of monozygotic twins.

If you have triplets or more, the principles are similar.

Disesase:-

Twin-twin transfusion syndrome

Identical twins who share the same placenta and chorion can sometimes share a condition called twin–twin transfusion syndrome (TTTS). In this condition, blood flows from one twin to the other, resulting in one baby getting too much blood and the other baby not getting enough. This affects the health of both babies, sometimes severely.