One of the countries in this list is somehow not included in the source above (its source was taken from a South Korean news agency instead), figure out which one before clicking on the link
Frankly speaking, South Korea doesn't recognize North Korea as a country, it is written in constitution of them. When North Korean defectors arrive in South Korea, they get SK citizenship quickly after they get some investigation for weeks or months. So, they don't really have chances to make birth as a North Korean from the beginning :)