Mono-Mono Twins Born Holding Hands, Still Glued To Each Other In a Special Bond Even After Turning Two Years Old

No force can separate what the universe has brought together. These identical twins took the Internet by storm when a photo of them, just minutes after being taken out of their mother's womb, showed them holding hands. Two years after, they still hold each other's hands as siblings, twins and the best of friends.

According to People, Jenna and Jillian Thistlewaithe are "mono-mono twins." They were born with one amniotic sac which meant their umbilical cords could be entangled and blood supply may be cut for one or both twins. It was a sensitive pregnancy for Sarah but one she couldn't be more thankful for.

When she and her husband found out they were having identical female twins, they were beyond excited. As a wonderful surprise, when the twins came out of Sarah's womb, they were holding hands--a nod to their future selves.

Now that both Jenna and Jillian are two years old, they like doing things together. Sarah shares that her daughters, although they look similar, have different personalities. Jenna is very vigilant while Jillian is a risk-taker. Nonetheless, the twins like to swim together, eat the same food, play with the same toys and dress alike (via People).

"Twins have this special bond and I can't wait to watch them grow up and be best friends," Sarah says to People. When you think about these twins entering the world together with their hands interlocked, Sarah's dream is not a grim possibility.

According to Popular Science, mono-mono twins are very rare. There is one pair born in every 10,000 pregnancies. Mono-mono stands for monoamniotic-monochorionic. Monoamniotic means the twins share one placenta, the organ that connects the fetus to the mother's uterine wall; monochorionic means they share one amniotic sac, the area where the fetus grows until the time comes for the mother to conceive.

Having mono-mono twins is very risky. If the other baby gets all the nutrients, the other one could end up dead. But according to Popular Science, what makes the Jenna and Jillian Thistlewaite rarer is that they were born without any major complications.

As per Twins U.K., historically, twins are rarely born. 1 in 80 births turn out to be twins. Approximately, six percent of children born in the U.S. in 2001 were twins. In thw world, 1 in 250 are identical twins.

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