A YOUNG woman has shared how she is one of the rarest types of twins in the world.
Hope Baxter and her sister, Faith, are known as Mo/Mo twins a term for monochorionic monoamniotic twins.
![Woman with heterochromia iridum explains that she's a monozygotic twin.](https://www.thesun.co.uk/wp-content/uploads/2025/01/s-rarest-world-split-later-966489497.jpg?strip=all&w=540)
![Two sisters standing outside. One wears a light blue sweater; the other wears a black sweater.](https://www.thesun.co.uk/wp-content/uploads/2025/01/FAB2025-01-25-09h01m42s016.jpg?strip=all&w=540)
These twins share one placenta and one amniotic sac, and are the rarest type of twins, with only one in five twin pregnancies falling into this category.
As the twins share everything, it means these are the most identical twins you can get.
Taking to social media, Hope answered questions fans had regarding her and her sister; one question was whether the pair could have been conjoined.
She said: “So, yes, Momo twins or Mono Mono twins are basically how you get conjoined twins, which is why Momo twins are the rarest type of twin.
“There are a lot of complications that come with that type of pregnancy.”
Fortunately, she and her sister split before they became conjoined but still suffered lots of complications.
Hope explained: “We were very premature and we had to stay in the NICU for many weeks after we were born, but luckily we both made it.
“That’s also why we are named Hope and Faith, because nobody really thought that both of us, or even any of us would make it.
“Faith had a collapsed lung when she was born, and I had some heart conditions that I had to get surgery for.
“So we really are Momo miracle babies.”
People have often asked Hope whether her eye colour is because of her birth and if her sister Faith also had it.
But Hope was quick to explain it was for a reason separate to her twin story.
She said: “I have a freckle in this eye making it brown.
“So it’s an ocular nevus and it’s not genetic.
What are the different types of twins?
TWINS are when two children are produced in the same pregnancy.
They can be identical or different, and two boys, two girls, or a girl and a boy.
Twins are quite rare, but are usually born completely healthy
What are the different types of twins?
Monozygotic – identical twins (‘one cell’ twins)
Dizygotic – also known as ‘fraternal’, non identical twins. Babies are no more alike than siblings born at separate times, and they can be the same or different sexes
Conjoined twins – identical twins that are joined together. They are extremely rare, and it’s estimated they range from one in 49,000 to 189,000 births, although around half are stillborn, and one third die within 24 hours.
Can identical twins be two different sexes?
Identical twins are always of the same sex because they form from the same fertilised egg that contains either female or male chromosomes.
The single egg is divided into two separate embryos, and they occur in about three in every 1000 deliveries worldwide.
Therefore, boy/girl twins are always fraternal (or dizygotic), as their chromosomes are either XY (male) or XX (female).
What are Di Di twins?
Di Di stands for Dichronic Diamniotic, and they are the common type of twins.
They have their own amniotic sacs and placenta, so are just sharing the womb of the mother, and are therefore not identical.
There are few complications with Di Di twins, so have a good chance of being born completely healthy without intervention from your doctor.
Di di twins are more likely to be non-identical than identical.
“Which is also why my identical twin sister does not have heterochromia.”
Her videos have gone viral with millions of views on her TikTok account @hopebaxter_.
One person wrote: “That’s crazy.”
Another commented: “MOMO twins are so rare and high risk. I have di-di twins.”
“Gorgeous queens,” penned a third.
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