A Polish mother of seven - now twelve - has successfully given birth to quintuplets.

The three girls and two boys were delivered via cesarean section at the University Hospital in Krakow on Sunday.

The babies, born in mother Dominika Clarke's 28th week of pregnancy, weighed between 710 and 1,400 grammes and were given breathing support and put in incubators. Doctors believe all the children are healthy.

Clarke already had five children ranging between 12 years and 10 months, including two sets of twins, with her British husband.

After the birth of the quintuplets, the 37-year-old said she was feeling better than expected at a news conference in Krakow on Tuesday.

“It is possible to have a really cool life with such a large bunch of children,” Clarke said, but only with "a system, a calm approach and a positive attitude."