Demonstrations have raged since presidential elections on October 20 that saw Morales gain an unconstitutional fourth term amid allegations of irregularities in the vote count.
Morales had previously acknowledged fathering a child with Gabriela Zapata during a two-year affair but claims she had told him the infant died shortly after birth.
By a narrow margin, voters in Bolivia have rejected a constitutional change that would have allowed leftist Evo Morales, South America's longest-sitting president, to run for a fourth term and potentially extend his rule to 2025.
