Arlington, Va. ? A brain-dead woman who was kept alive for three months so she could deliver the child she was carrying was removed from life support Wednesday and died, a day after giving birth.

“This is obviously a bittersweet time for our family,” Justin Torres, the woman’s brother-in-law, said.

Susan Torres, a cancer-stricken, 26-year-old researcher at the National Institutes of Health, suffered a stroke in May after melanoma spread to her brain.

Her family decided to keep her alive to give her fetus a chance.

It became a race between the fetus’ development and the cancer that was ravaging the woman’s body.

Doctors said that Torres’ health was deteriorating and that the risk of harm to the fetus finally outweighed the benefits of extending the pregnancy.

Torres gave birth to a daughter, Susan Anne Catherine Torres, by Caesarean section Tuesday at Virginia Hospital Center. The baby was about two months premature and weighed 1 pound, 13 ounces. She was in the neonatal intensive care unit.

Dr. Donna Tilden-Archer, the hospital’s director of neonatology, described the child as “very vigorous.” She said the baby had responded when she received stimulation, indicating she was healthy.

Doctors removed Torres from life support early Wednesday with the consent of her husband, Jason Torres, after she received the final sacrament of the Roman Catholic Church.

Dr. Christopher McManus, who coordinated care for Susan Torres, put the infant’s chances of developing cancer at less than 25 percent. He said 19 women who have had the same aggressive form of melanoma as Torres have given birth, and five of their babies contracted the disease.

McManus said there were no signs the cancer had crossed the placenta, which would greatly increase the baby’s risk for the disease. McManus said the placenta itself was being examined for any evidence of cancer.

A Web site, www.susantorresfund.org, was set up to help raise money for the family’s mounting medical bills, and as of two weeks ago, people from around the world had donated about $400,000.

The couple have one other child, 2-year-old Peter.