This is a similar case to that of Mary/Mark Weston (tinyurl.com/y3zc6b3s), who became aware he was actually a fully biological male, and fathered children after a female athletics career.
www.dailymail.co.uk/news/article-6772989/Intersex-skiing-champion-say-transgender-women-NOT-compete-female-events.html
He talks about transgender athletes, but his case is actually more similar to Caster Semenya et al. Erik seems to have and had a clear male gender identity, and has fathered children after an operation on his genitals as an adult.
In 1988 he gave his (female) gold world skiing medal from 1966 to the second place competitor.