The two MDC factions on Monday said they had reunited and would therefore have a majority in parliament.
This was confirmed over the weekend, when the unchanged results of 18 of 23 seats being recounted were released.
But Mr Chidyausiku argued that a two-thirds majority was needed to change the constitution and said there was a "hung parliament".
Arthur Mutambara and Morgan Tsvangirai
The two opposition factions say they have reunited against Zanu-PF
However, President Robert Mugabe's Zanu-PF governed without such a majority between 2000 and 2005.
Last week, the Herald, seen as a government mouthpiece, ran an opinion piece calling for a government of national unity.
Elections officials say that the process of verifying presidential results will start after final parliamentary results are announced.
But they warn it could take as long as a week, as they will only be released after both sides agree.
The elections were held on 29 March - a month ago.
"It's definitely a world record and it's not something to be proud of," said Zimbabwean independent MP and former Mugabe ally Jonathan Moyo.
"And, when it comes, its credibility will be irretrievably compromised," he said.
But Mr Chidyausiku dismissed as "totally false" the argument that the delay was to give Zanu-PF time to rig the outcome.
He pointed out that similar claims were made when the electoral commission said it was recounting 23 parliamentary results.
Mr Tsvangirai says he won the election outright and has called on Mr Mugabe to step down.
"The old man must go and have an honourable exit."
But independent monitors and Mr Mugabe's allies say that neither candidate passed the threshold of more than 50% of the vote required to be declared the president and so a run-off will needed.
'Totally false'
The two MDC factions on Monday said they had reunited and would therefore have a majority in parliament.
This was confirmed over the weekend, when the unchanged results of 18 of 23 seats being recounted were released.
But Mr Chidyausiku argued that a two-thirds majority was needed to change the constitution and said there was a "hung parliament".
Arthur Mutambara and Morgan Tsvangirai
The two opposition factions say they have reunited against Zanu-PF
However, President Robert Mugabe's Zanu-PF governed without such a majority between 2000 and 2005.
Last week, the Herald, seen as a government mouthpiece, ran an opinion piece calling for a government of national unity.
Elections officials say that the process of verifying presidential results will start after final parliamentary results are announced.
But they warn it could take as long as a week, as they will only be released after both sides agree.
The elections were held on 29 March - a month ago.
"It's definitely a world record and it's not something to be proud of," said Zimbabwean independent MP and former Mugabe ally Jonathan Moyo.
"And, when it comes, its credibility will be irretrievably compromised," he said.
But Mr Chidyausiku dismissed as "totally false" the argument that the delay was to give Zanu-PF time to rig the outcome.
He pointed out that similar claims were made when the electoral commission said it was recounting 23 parliamentary results.
Mr Tsvangirai says he won the election outright and has called on Mr Mugabe to step down.
"The old man must go and have an honourable exit."
But independent monitors and Mr Mugabe's allies say that neither candidate passed the threshold of more than 50% of the vote required to be declared the president and so a run-off will needed.
