Police in St. Anthony in eastern Idaho were tipped to the case last month by medical workers who reported the child was pregnant.
She gave birth two weeks ago. Authorities are offering no information about her or the newborn.
Thirty-seven-year-old Guadalupe Gutierre-Juarez is being held on a-quarter million dollar's bond one count of rape. Police aren't saying whether there's a family connection but do say the prosecutor is considering additional counts of rape.
A medical anthropologist in Washington says it is highly unusual for a 10-year-old to give birth, but not impossible because of earlier development.
