Reports from Ukraine say the prime minister, Yulia Tymoshenko, will challenge the result of Sunday's presidential election, which officials say was narrowly won by the opposition leader, Viktor Yanukovych.
Supporters of Mrs Tymoshenko said she would never recognise the legitimacy of the vote, and would demand a recount of ballots from some polling stations.
So, what does the future hold for Ukraine?
Olga Shumylo is director of the International Centre for Policy Studies in Kiev.
First broadcast 9 February 2010