Woman gives birth to two babies conceived 10 days apart

Kate Hill’s pregnancy was so unusual the birth of her baby girls has been hailed a miracle.

The Brisbane mother-of-two and her husband Peter were struggling to conceive. In 2006 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. 

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

Hill conceived two babies, 10 days apart.

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."

Women do not usually ovulate once they fell pregnant - but Hill did.

- Daily Mail