The postponement is related to a judge who presided over the previous session on the case, a source in the regional court reported on Thursday.
Proceedings on the case of adoption bribery, known as the Fratti case, was delayed earlier twice due to default in appearance and illness of the lawyer of one of the accused.
It will be the third time that the case will be looked into in the Volgograd regional court.
The presidium of the Russian Supreme Court overturned the decision of the Volgograd court in December 2004 and returned the case to the original court citing irregularities in the procedures.
On April 12, 2002 Volgograd court acquitted all four of the accused for insufficient evidence.
After considering an appeal filed by the Volgograd regional prosecutor's office, Russia's Supreme Court returned the Fratti case to Volgograd on September 11, 2002.
The Volgograd regional court gave Nadezhda Fratti, national of Russia and Italy, a seven-year suspended jail sentence on December 30, 2002.
Chief physician of the Mikhahilovsky orphanage Antonina Tekucheva, ex-Director of Volgograd's Kirovsky orphanage Tatyana Chaplina and education department inspector Valentina Gerusova, accessible to bribery, were also found guilty.
The decision with regard to all the four persons involved was overturned, and new proceeding have been initiated, the source was quoted as saying.