Story highlights The president's sister was defeated by a conservative

Ali Larijani, the parliament's speaker, won re-election

Conservatives fared well in the race

(CNN) Iranian President Mahmoud Ahmadinejad's sister lost her bid for a seat in the nation's parliamentary elections, a result seen as a blow to the controversial leader and, according to one analyst, a "possible sign of fraud."

Parvin Ahmadinejad, running in her family's hometown of Garmsar, was defeated by a conservative rival in Friday's elections for the Majlis, Iran's parliament, the country's news outlets said Saturday.

More than 64 percent of eligible voters streamed to the polls in large numbers, and election officials praised the exercise, in which about 3,400 candidates vied for Majlis seats.

It's first time Iranians are voting since allegations of rigging in the 2009 elections triggered mass street protests against President Ahmadinejad's re-election.

Many observers say the underlying issue of the election is whether voters back the president, who has been in a rivalry with Iranian Supreme Leader Ayatollah Ali Khamenei.

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