The renewal of diplomatic ties between the US and Cuba follows two years of secret negotiations, hinging partly on a prisoner swap.
One of the freed prisoners was Cuban spy Gerardo Hernandez, who was serving two life terms in the US.
His wife's requests to visit him were repeatedly denied. But when Hernandez was finally released, she was nine months pregnant.
Al Jazeera's Lucia Newman reports from Havana.
Source: Al Jazeera