Doctors from Craiova hospital in southern Romania said Lacatus' heart stopped. Hospital manager Florin Petrescu said doctors tried to resuscitate Lacatus for 30 minutes, a task made difficult because of her extreme obesity.
After she gave birth by cesarean section to a 6.4 pounds (2.9 kilograms) baby girl on Feb. 18, Lacatus gained another 44 pounds (20 kilograms), her sister Cristina Sosoiu told the daily Libertatea. Doctors had told Lacatus to go on a diet but she apparently kept eating, the paper reported.
Her daughter, Anisoara, currently weighs just a little over 9 pounds (4 kilograms), the paper said. She lives with her maternal grandmother. It is not clear why the baby does not live with her father, Costica Lacatus.
Lacatus fell ill with a fever last week and was hospitalized in her home town of Caracal in southern Romania before she was moved to the main regional hospital where she died.
When Lacatus gave birth on Feb. 18, Dr. Daghni Rasasingham, of Britain's Royal College of Obstetricians and Gynecologists in London said the case was rare, given the mother's weight and height of 5 feet and 3 inches (1.6 meters).
Rasasingham said she would be at risk of clots, diabetes, post-birth bleeding and infection.
Nicolae Cernea, a doctor from the southern city of Craiova -- where Lacatus was hospitalized for a month before delivery -- said her case was unique in Romania.
In August 2008, a heavier obese woman -- 560-pound (255-kilogram) Leanne Salt -- gave birth to triplets in Britain.