VISTA, Calif. -- A 25-year-old Vista woman pleaded guilty Tuesday to voluntary manslaughter for suffocating her newborn son, who was found dead in a trash can.

Edith Ledesma, who had been charged with murder, faces up to 11 years in prison when sentenced by Judge Timothy Casserly on Sept. 26.

According to preliminary hearing testimony, Ledesma, who has three other children, hid her pregnancy from her common-law husband because he'd had a vasectomy.

She gave birth in the back yard of her Portia Avenue home on May 13 last year, wrapped the infant in a blanket, towel and white plastic bag and set him outside.

Meanwhile, Ledesma was taken to a hospital because she was bleeding profusely. There, she told a social worker what she'd done, and the newborn's body was found the next day.

Defense attorney Matthew Roberts said his client's common-law husband had rejected their first child because he didn't think it looked like him. "She was overwhelmed" when she became pregnant, despite the vasectomy, the lawyer said.

After the birth, Ledesma was "bleeding to death" as she wrapped up the baby, Roberts said. He said his client didn't realize until later that she might have suffocated the infant.

Deputy District Attorney Per Hellstrom said the defendant was a hard working woman with no prior criminal history, who "by all accounts was an excellent mother to her three surviving children."

She did not fit the profile of a killer of young children, Hellstrom said.

Roberts said his client "was heartbroken" over the death of her son.