7 children in two pregnancies

Angela Magdaleno, who had triplets three years ago, gave birth to quadruplets July 6 by Caesarean section in what doctors said was a rare occurrence of multiple births. Though she used fertility drugs with the triplets, she didn't with the quadruplets. The latest additions were doing well Wednesday, while their mother, resting at home, said: "I'm happy because they're healthy and so am I."

Still, Magdaleno, 40, worried she might be overwhelmed with the work and sometimes struggles with mixed emotions about the future, Xinhua reports.

Three years ago, Magdaleno gave birth to the triplets after undergoing in vitro fertilization.

The babies were born at 32 weeks - well beyond the 29-week average for quadruplets. At birth, the girls were 4 pounds; the boys about 3.5 pounds, according to the AP.

Shaw said the odds of conceiving quadruplets without fertility drugs are about one in 800,000.

Even more rare, the boys appear to be identical twins, said their doctor, Soha Idriss, who expects the babies to join their mother at home in about eight weeks. As of Wednesday, their parents were still deciding what to name them.