A woman got pregnant again while still pregnant with twins.
The US mum-to-be is now expecting triplets after conceiving while already pregnant with twins.
Doctors told the woman and her fiancé they were expecting twins and they were overjoyed with the news.
The woman was then stunned when doctors later told her she was carrying triplets after a third baby was conceived around 10 days after the twins had been conceived.
The woman took to TikTok with the handle @theblondebunny1 to share her incredible journey as she gets ready to welcome the three babies next year.
Pregnant woman conceives a third baby while already pregnant with twins
The woman, who works in marketing, explained that the phenomenon is called superfetation, and occurs when a woman ovulates twice a month.
The mum-to-be said: “Normally your body is supposed to switch up your hormones and stop you from ovulating again once you‘re already pregnant. In my circumstance it did not.
“About 10 per cent of women can ovulate twice a month. Only I think .3 per cent get pregnant a second time.
“So technically our babies do have different due dates. Luckily they’re close enough that they will be born the same day, so they will all still be considered triplets.
“So with superfetation the eggs came at different dates, and so they have different gestational ages.
“Ours are only a few weeks apart but sometimes they can be months apart, and those people actually have to have different due dates.”
The mum-to-be, who doesn’t yet know the genders of her babies, explained the doctors ruled out the possibility of having a third triplet who was malnourished.
Pregnant woman conceives a third baby while already pregnant with twins
“The first two babies are 10 and 11 days older than our third baby, so that’s how we knew straight away it was a second pregnancy,” she said.
“To confirm it was superfetation and not just twin absorption or a malnourished baby the doctors are doing ultrasounds every two weeks.
“And sure enough it’s been hitting every single milestone, growing at a healthy rate, just 10 to 11 days behind the first two babies we have.”
She had a word of warning for any pregnant women out there, saying: “So when your man doesn’t want to use protection because you’re already pregnant – I would be cautious.”
The mum-to-be is getting ready for an April or May birth.
She said the current plan is to get all three babies past 28 weeks, and ideally carry them until 32 or 35 weeks.
The woman said she and her partner “hit the jackpot”, and she said she probably wouldn’t have any more children after these three.