The Highlanders and Southland first five-eighths and partner Miriam on Saturday welcomed baby Milla into the world.
Sopoaga was a late withdrawal from the All Blacks' trip to Argentina for next weekend's Rugby Championship clash against the Pumas, replaced by Beauden Barrett who had originally been slated for a rare week off.
All Blacks coach Steve Hansen confirmed on Friday before flying out of Auckland for Buenos Aires that Sopoaga would almost certainly join them in Cape Town for the following weekend's Rugby Championship finale against the Springboks.
