Is Nigeria's president fit to govern?
Mr Yar'Adua's state of health is unclear, and it is not known whether he wants to return to his post. Nigerians have been questioning whether or not the 58-year-old is fit enough to govern.
In his absence, the country's political elite has been consumed by a power struggle. Vice-President Goodluck Jonathan has been reshuffling ministers, pledging to tackle power shortages and forging ahead with an amnesty for militants in the oil-rich Niger Delta.
How do you feel about President Yar'Adua's return? Should he retake power? What questions does he need to answer first? How has his absence affected Nigeria? And what does the future hold for the country?