65-year-old mother of 13 pregnant again with quadruplets

Move over, Duggar family! A 65-year-old woman who is already mother to 13 children is set to become the oldest woman in recorded history to give birth to quadruplets when her due date arrives later this spring.

Annegret Raunigk's children range in age from 9 to 44, from five different fathers. She said she decided to become pregnant again because her 9-year-old daughter wanted a younger sibling.

Raunigk became pregnant after multiple attempts at in-vitro fertilization. She told Bild newspaper that donated eggs were fertilized and implanted at a clinic outside Germany.

Her decision has been met with widespread criticism by medical professionals as a risk both to her and the unborn babies.

"Any pregnancy of a woman over age 45 has to be considered a high-risk pregnancy; over 60 this is naturally extreme," Dr. Holger Stepan, head of obstetrics at the University of Leipzig, told the dpa news agency. "The 65-year-old body is definitely not designed to carry a pregnancy, not of one child and certainly not of quadruplets," he said.

Raunigk is a Berlin schoolteacher who is expected to soon retire.

The Associated Press contributed to this report.