A case that could determine whether firms have to pay fathers on maternity leave the same as women is being heard by the Employment Appeal Tribunal.
The support services firm Capita is appealing against a ruling in June that it failed to give a new father full paternity leave rights.
Madasar Ali, whose wife had post-natal depression, was offered two weeks’ pay, whereas a woman is paid for 14 weeks.
A tribunal ruled Mr Ali, a call centre worker, had been discriminated against.
The BBC’s legal correspondent Clive Coleman says the outcome of the appeal will be binding for similar cases in the future. More