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A newborn baby who died after being tossed from a second-story apartment on Friday was female, weighed 2 pounds and was 14 inches long, police said Monday.

Based on those dimensions, the child likely was 27 to 28 weeks gestational age, said Dr. Ann Anderson-Berry, director of the neonatal intensive care unit at the Nebraska Medical Center. The survival chances of such a child born outside a hospital setting, Anderson-Berry said, are very low.

The infant’s mother, Antonia Lopez, 16, was booked into the Douglas County Youth Center on Saturday on suspicion of one count of felony child abuse resulting in death. The charge, which treats Lopez as an adult, is expected to be filed this week, authorities said.

Early Friday, police have said, Lopez was alone in her bedroom at the Kellom Knolls Apartments near 25th Avenue and Cuming Street when she went into labor. After delivering the baby she threw the newborn out the window of her apartment, police said, and told her mother what she had done. Her mother went outside and found the infant in the grass, called 911 and performed CPR on the infant until medics arrived, police said.

Fire Department paramedics indicated that the newborn was dead by the time they transported her to nearby Creighton University Medical Center. There, the baby was pronounced dead.