A Florida woman has been arrested and charged with sexual battery for becoming pregnant with an 11-year-old boy's child.

Marissa Ashley Mowry, 25, allegedly had sex with the boy in January 2014 and gave birth to a child in October of that year.

The Hillsborough County Sheriff's Office said Ms Mowry had sexual contact with the boy, now 14, "multiple times" over the next three years as well.

The 3-year-old child has been taken from Ms Mowry and been safely placed in another home.

According to jail records Ms Mowry works at the Busch Gardens amusement park in Tampa, Florida as a food attendant.