My twins were conceived in different months but the oldest wasn’t born first – it’s so unusual, people think it’s a myth
A WOMAN who conceived twins in different months has admitted her story is so unusual that some people even think it's a "myth".
Cheri is a mum of four, and welcomed twin daughters in July.
But her pregnancy was anything but normal, as she actually conceived the girls in two separate months.
"How unusual is this?" she wrote.
"Twin B was conceived the last week in November 2022.
"Twin A was conceived the first week of December 2022."
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And what makes things even more unusual is that the baby who was conceived first actually came out last.
"So technically twin B is the oldest, but twin A is actually the oldest," Cheri explained.
"Twin A's waters ruptured at 25 weeks and after a 6 week hospital stay, managed to stay put to 31 weeks.
"9 weeks premature, but thriving amazingly. No health concerns".
She then shared solo pictures of her babies, writing over the top of the first: "I'm twin B and was the first to be conceived but I came out last making me the youngest - 4lbs 7oz.
"I'm twin A and caused all the mischief - I was conceived a week after my twin but I came out first so I'm the oldest. 3lbs 5oz," she wrote over the second.
Cheri's video quickly attracted comments from viewers, with one writing: "Speaking as a twin, when you tell them this when they're older, they're gonna have some great arguments over who is the oldest."
"How does this work? Did you get pregnant when already pregnant?" another asked.
"Apparently so, 2 eggs was released one was slower moving down the tubes compared to the other egg!" Cheri replied.
"But all through pregnancy was a week apart too!"
"So were you considered 29w and 30w pregnant at the same time?" someone else added.
"I heard this could happen but I thought it was a myth tbh!"
"Exact thing happened to me twinA(girl born first but twinB(boy is older by 3 days we had all the nurses&midwives baffled they couldn’t work it out," another wrote.
"How can they be twins then?" someone else asked.
With Cheri responding: "Dcda non identical/fraternal more common then you’d think!"
The phenomenon is known as superfetation - where a woman who is already pregnant falls pregnant for a second time.
It occurs when another egg is fertilised by sperm and implanted in the womb days, or sometimes even weeks, later than the first one.
While it's common in animals such as badgers and hares, it's extremely rare in humans.
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"Superfetation results in fetuses with different ages and sizes," the Healthline website writes.
"Despite this, it’s possible for both babies to be born fully developed and completely healthy."