An Australian woman who made headlines by falling pregnant with quadruplets -- twice -- has added to her brood by delivering twins, reports said Monday.
Dale Chalk, 31, and husband Darren are now the proud parents of 11 children under the age of seven, AFP reported.
"We'd love to have more children, but medically, that's it," Darren told the Courier-Mail. "We'd have to buy a bigger bus!"
Dale became pregnant with her second set of quads in 2005. The babies were delivered in October of that year but only three survived.
The first set -- two boys and two girls -- were born in August, 2004 and are due to start school next year. The couple also have a six-year-old daughter and another girl born in 2007.
They are understood to have used a low-grade infertility treatment for the multiple births.