Two girls who were born as 'Momo' twins have revealed how their parents know who is who.
The girls, who are one of the rarest types of twins in the world, are both now 24-years-old after having a pretty rough start to their lives.
Faith and Hope Baxter were born with a one percent chance of survival, which was only afforded to them with the help of doctors.
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The women were born as monochorionic monoamniotic identical twins, which means that they shared both a placenta and amniotic sac, as opposed to growing their own individual sacs as twins usually do.
Momo twins account for one percent of all twin pregnancies, making them extremely rare.
Because of this condition, doctors informed their parents that they would not be likely to survive if they were to be born full term, which is between 37- and 40-weeks’ gestation. So, in a bid to save the pair, doctors suggested inducing their mother two months early.
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Having decided to give their daughters the best chance possible, they decided to go ahead with the induction, which meant that the girls spent the first six weeks of their lives in the NICU with just a one percent chance of survival.
Faith was born with a collapsed lung and Hope was born with heart problems.
Hope revealed that it was a ‘miracle’ that they are alive and thanked the doctors for allowing them the chance to live.
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Hope, from Ohio, US said: "I didn't realise the severity and extent of the amount of fear my parents were put through. I am so grateful to them to be here - every day is a gift for us.
"On our birthday, we reflect on the fact we are miracle babies. I am so proud of how far we have got. Even to have both of us here, alive and well, is a miracle."
As identical twins, they have since found that their parents made sure that they didn’t get them mixed up with one another.
As it turns out, there is one difference between Hope and her sister.
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Hope was born with heterochromia, which is where their eyes are different colours. She has one blue eye and another which is brown.
Hope said: "Lucky for them, they never got us mixed up growing up. The way they would tell Faith and I apart is I have two different coloured eyes.
"I don't think they struggled with us growing up, they had a system where when one of us would be at pre-school and the other one would be at home with our parents.
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"They didn't want us to completely rely on each other."
Now at 24, the girls are well and even training to go into the medical field.
While Hope is a dental nurse, Faith is training to be a doctor at VCOM-Carolinas, South Carolina.
Hope’s social media account shows that she is on track to be wrapped up with her OSU College of Dentistry in 2026, leaving her with qualifications to be a dentist.