A woman’s pregnancy is so unusual the birth of her baby girls has been hailed a miracle.

Brisbane mother-of-two, Kate Hill, and her husband Peter were struggling to conceive.

In 2006 Mrs Hill has diagnosed with polycystic ovarian syndrome: a hormonal condition that left her unable to ovulate.

She underwent hormone treatment and fell pregnant, not once, but twice, reports Daily Mail.

It was a medical phenomenon so rare there are only 10 medically documented cases of it in the world.

Mrs Hill conceived two babies, 10 days apart. They only had sex the once.

The conception is called superfetation, which essentially means she fell pregnant while already pregnant.

‘Superfetation is extremely rare – I had fallen pregnant and my body had spontaneously released another egg giving the embryos different gestational ages,’ Mrs Hill said.

‘What makes this case even more rare, is that my husband and I only had intercourse one time – his sperm stayed alive for 10 days to fertilise the second egg released.’

Mrs Hill told Today Tonight women did not usually ovulate once they fell pregnant – but she did.

The rare conception started as a single pregnancy with twins, before she conceived again 10 days later to be pregnant with triplets.

Sadly the couple lost one of the babies early on in the pregnancy, and the Hills were given two due dates – December 20 and December 30 2015.

Their adorable girls, Charlotte and Olivia, were born together two days before their scheduled caesarean. The girls even have totally different blood types.

Share your comments below.

Image via Today Tonight.

  • Wow, how unique. Modern science and evolution..


  • Amazing story and they look so beautiful!


  • I am astounded that this happened but it is believeable. The Mum is lucky that only one of the twins miscarried.


  • what an incredible story! Congratulations!!


  • Wow. I’ve heard of this a few times, but it’s amazing.


  • That’s pretty amazing. I never though that was possible!


  • Oh yes! I saw them last week in “Today Tonight”. Such a special pregnancy, very rare!!


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