What is the most common twin type?

fraternal twins Dizygotic twins are the most common type and are known as fraternal twins. Two-thirds of all sets of twins are dizygotic. When two eggs are fertilized during the same pregnancy, the result is a set of dizygotic twins. They are fertilized by two different sperm.

webmd.com - Types of Twins: What to Know - WebMD

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The two children don’t share a parent or the same DNA. They’re cousins but genetically, they’re closer to siblings born to the same parents. Physically, the children might also look very similar. The popular term for this is “quaternary twins” as the two sets of parents share the same DNA. But experts don’t scientifically consider these children to be twins. And there are little to no studies found on quaternary twins. Quaternary twins. While not well researched, this is a rare phenomenon that happens when one set of identical twins have children with another set of twins within a short period of time, usually less than nine months. So far, only a couple of cases of sesquizygotic twins have been identified. Experts say there’s more research to be done on this topic. In general, semi-identical twins are so rare that they’re next to impossible. When one egg is fertilized by two different sperms, it creates three sets of chromosomes -- the thread-like structures that make up DNA. Research shows that usually these embryos don’t survive.

How to Determine if Twins Are Identical or Fraternal

If the two babies are of different genders, then it’s quite easy to know that they are dizygotic twins. However, it might not be as easy to determine if the two babies are of the same gender. At the time of birth, doctors can take a look at the placenta and fetal membranes to see if the babies are monozygotic or dizygotic. Sometimes it’s possible to know if same-gender twins are identical or fraternal during pregnancy. If you have an ultrasound after 14 weeks of conception, your doctor or birth specialist might be able to determine what kind of placenta your babies have. The best way to know if your set of twins is monozygotic or dizygotic is to have a DNA test done after they are born. Sometimes, determining the type of twins on the placenta alone can be unreliable. A family can be told that a set of twins is identical at birth based on the placenta alone, but as they grow older they start to notice more and more differences between the children. The opposite can also be true, that families are told that their twins are fraternal based on the placenta when really they are identical. It’s important to note that even if a set of twins is identical, they might still have some physical differences. These differences can be caused by environmental factors, including positioning inside of the womb. Differences might develop after birth as a response to the babies’ environment. Pieces of their DNA can turn on or off depending on their surroundings, so twins may start to differ as they get older.

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What is a set of 10 babies called?

– Decuplets: a combination of 10 of a kind. In this case, babies! A South African woman has reportedly given birth to 10 babies at once, besting a world record set just last month.

clickorlando.com - TEN? Woman gives birth to 10 babies at one time: report - Click Orlando

ORLANDO, Fla. – Decuplets: a combination of 10 of a kind. In this case, babies! A South African woman has reportedly given birth to 10 babies at once, besting a world record set just last month. [TRENDING: Red-headed reptiles roam Fla. | Boy caught in roll-up gate dies | Aiden Fucci’s mom arrested in murder case] The Pretoria News reported that Gosiame Thamara Sithole, 37, gave birth by Caesarean section to 10 babies.

“It’s seven boys and three girls,” her husband said.

According to the report, Sithole, a mother of 6-year-old twins, said her pregnancy was natural and that she had not received fertility treatment, which has been linked to other multiple-baby births. If confirmed, Sithole’s delivery would make it the first known birth of decuplets. Guinness World Records told the New York Post that it has yet to verify the record. “Guinness World Records is aware of the news that Gosiame Thamara Sithole has given birth to decuplets, and we send our congratulations and best wishes to the family,” a spokesperson said. The current record is held by Halima Cisse, who gave birth to nine kids in Malia earlier this year.

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