And it appears she was impregnated by her 44-year-old stepfather - not a 17-year-old boyfriend, the news agency reports.
The girl, know as Dafne, gave birth by C-section on Jan. 27 to a baby girl who weighed 5.7 pounds at Occidente General Hospital in Zapopan.
Mom and child were reported in good condition at the time, but news of the girl getting pregant at such a young age sparked outrage and an intense child abuse probe.
It was first reported that her teen boyfriend was the father and he took off about the time Dafne gave birth when she refused to live with him.
MailOnline reports that DNA tests were used to identify the real father and an "anthropological study" was done to determine Dafne's real age.
Dafne is from a village 30 kilometres outside Guadalajara and is one of 11 siblings.