'I tracked down my long lost sister after 30 years -then she became my surrogate'; After learning he was adopted from a young age, Mark MacDonald didn't think much about tracking down his biological family -but when he learned he couldn't have kids, everything changed

Byline: By, Jessica Taylor Mark MacDonald grew up knowing he was adopted after his biological mum had him at just 16, but he says he 'never really gave it much [...]