The sentence of Michael Pearce - who was jailed for nine years for killing a six-week-old baby - has been referred to the Court of Appeal.
The Attorney General has confirmed that the matter had been referred following complaints that the sentence was 'unduly lenient.'
The case will be heard in five to six weeks.
More top news
Helen Plint has the latest forecast for Wales.
The Labour conference has voted to give the Welsh party more autonomy, despite opposition from supporters of Jeremy Corbyn.
Matthew Barzun says he like to visit places outside London, including Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch