Placenta previa is a potentially life-threatening condition during and after pregnancy when the placenta covers the cervix.

"In an interview with Us Weekly magazine, the 39-year-old mother of four revealed just how risky her fourth pregnancy really was."

"Spelling was rushed to a Los Angeles hospital, where she learned she had a condition called placenta previa, in which the placenta covers the opening of the cervix. The condition most likely resulted in part from the C-sections she had with her three other children."

"Twenty weeks into the pregnancy, Spelling woke up one day to find blood dripping down her legs, the magazine reports in its new issue."

"The problems put Spelling at risk for substantial bleeding, which could have forced doctors to terminate the pregnancy and remove her uterus to save her life."

"Doctors ordered bed rest for four months. After nine intense bleeding episodes, Finn was born via C-section Aug. 30, 37 weeks into the pregnancy."

"While Finn was healthy, Spelling’s own health troubles weren’t over. Three weeks after Finn’s birth, Spelling’s surgical scar ruptured. She had emergency surgery and remained hospitalized for two weeks."

Read more at ABC News