7.25m (32.4%) tuned in at 9pm on ITV as Tina went into labour on the day of the Rovers Return re-opening.
The episode had a high +1 figure of 629k (3.4%) an hour later.
Coronation Street will air in the special slot every night except Wednesday this week, as the soap's ongoing surrogacy storyline comes to a head.
> 'Coronation Street', 'EastEnders', 'Emmerdale' - schedule changes up to June 7
BARB ratings data supplied by Attentional
Digital Spy Soap Scoop video - press play below to watch Amie Parker-Williams reveal gossip on Tina's baby decision in Coronation Street, a betrayal revealed in EastEnders, a parenting shock in Emmerdale and bad news for a long-standing Hollyoaks character.