This woman conceived her twins three weeks apart and our minds are blown

That’s right, Rebecca Roberts got pregnant WHILE pregnant, and the new, less-developed baby showed up during her 12-week scan.

twin babies Rosalie and Noah, who were conceived three weeks apart

Photo: @roberts.supertwins on Instagram

Exciting as they are, ultrasounds can be freaky—the technicians are often silent and unable to share what they’re seeing. But when Rebecca Roberts had her 12-week scan, there was no way her technician could keep quiet after finding a second baby floating around in her uterus!

“I thought something awful had happened,” Roberts, of Wiltshire, England, told the Washington Post. “The sonographer looked at me and was like, ‘do you know you’re expecting twins?’”

Rebecca wasn’t expecting twins, as far as she knew. In fact, she and her partner, Rhys Weaver, had been struggling with fertility issues, so finding out five weeks earlier that they were pregnant with just one baby was already a big surprise. But in a super rare phenomenon that’s said to have been recorded less than a dozen times, according to the European Journal of Obstetrics & Gynecology and Reproductive Biology, it looks like this mom got pregnant while already pregnant. Her babies were conceived a few weeks apart.

“We were concerned because the second twin was much smaller,” explained her obstetrician, David Walker. “It was only by regularly scanning and seeing that the rate of growth was consistently three weeks behind that we realized it was superfetation.”

It’s so rare that in his 25 years of practice, Dr Walker had never seen it happen, and they did numerous ultrasounds before he was confident that this was the case.

“My initial reaction was, ‘How had I missed the second twin?’” Walker told Good Morning America. “And following this [I] was slightly relieved that it was not my mistake but a quite extraordinary pregnancy.”

Needless to say, not a lot of results came up when Roberts, who also has a 15-year-old daughter, went home and got to Googling.

“It just doesn’t happen,” Walker told the Washington Post. This is because when a woman gets pregnant, her body puts the breaks on conception (hormones are responsible for a lot more than those brutal mood swings). But somehow, not only did a miracle egg slipped through the cracks when ovulation was supposed to have stopped, but it also managed to fertilize and implant in her uterus.


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