A doctor can tell you or when you give birth to them you would know. Fraternal twins is two separate eggs from the ovaries get fertilised.
From what i know, if your twins are identical then you have no increased chance of having twins a second time. If your twins are fraternal, you are twice as likely to have twins again because fraternal twins are the result of more than egg being released and that is a genetic trate.
you have about a 1 in 60 chance of having natural fraternal twins.
(Person that asked the question)-Once twins are born, and old enough to determine whether they are identical or fraternal, how do you know if they are identical, or just fraternal twins that look identical? I was just curious.
i say that identical twins are the least rare because like me a fraternal twin i only know 1 pair of fraternal twin.
How do fraternal twins form? Answer one egg from each ovary is fertilized.
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.
Fraternal twins share most of their genetic material, by virtue of having the same parents. Identical twins, however, by definition share 100% of their DNA. This means, for example, that identical twins cannot ever be one of each gender, as fraternal twins often are.
Another name for fraternal twins is dizygotic twins.
Fraternal twins are more popular.
There is no precise percentage of fraternal or identical twins but it is estimated that 2/3 of all twins are fraternal where as 1/3 of twins are identical.
My Paternal grandfather and his sister were twins. I myself have fraternal twin boys. But none of my 1st cousins, or my sister have twins. I have two cousins who have had 3 single births so far, and my sister has had 2 single births as well. I dont know the chances of them giving birth to twins, but it does seem relatively low.
identical twins are single egg twins. fraternal twins a two egg twins. fraternal