There was another case from peru. Sadly to say, usually at a young age, they are not consent sexual. They were rape.
Lina Medina, from the Ticrapo District of Peru, gave birth by cesarean section in Lima at age 5+1⁄2. The infant was a 2.69 kg (5.9 lb), 47.5 cm (18.7 in) boy named Gerardo. Medina's parents, who thought their daughter had a tumor, took her to a hospital, where she was then found to be 7 months pregnant when she was about 5 years and 6 months old. She gave birth 1+1⁄2 months later. By interrogating her parents, the doctors understood that Medina had entered into precocious puberty (when hormone glands are activated earlier than normal) very early after her birth.[1][2][3][4][5]
Medina's father was arrested on suspicion of sexual abuse, but was later released due to lack of evidence, and the baby's biological father was never identified.[1][4]
https://en.wikipedia.org/wiki/List_of_youngest_birth_mothers