The presenter will not film the final two episodes of King of... under doctor's orders, a Channel 4 spokesperson has announced.
"Following medical advice, Claudia Winkleman is unable to continue with any work commitments. As Claudia is essentially the king of King Of... it will mean that the last two episodes will not be filmed," a representative for the broadcaster told The British Comedy Guide.
However, the rep added: "We are delighted with the episodes we have and look forward to working with Claudia soon."
Meanwhile, after recording was cancelled earlier this week, Winkleman tweeted: "I can't do the others as am on bedrest. Was supposed to be with Ruby Wax and Jonny Vegas today. Livid."
Opening last Friday to 1.2m viewers, the programme will continue for another three weeks before being taken off air. Guests for the filmed episodes are Lorraine Kelly, Jack Whitehall, Miranda Hart and Micky Flanagan.
Channel 4's King of... continues tonight at 9.30pm, featuring guests Jessie Wallace and Stephen Mangan.
Winkleman's pregnancy has also caused entanglements for Radio 2 panel show Hot Gossip, with DJ Sara Cox being called in as a last-minute replacement for its fourth series which begins tomorrow.
> Claudia Winkleman wants Adam Woodyatt for talkshow