She was a member of the Slovenian biathlon team from 2002 to 2017, having been a
cross-country skier before that. Her best result in the
Biathlon World Cup is 2nd place in the 15 km Individual race in the
World Championships held in
Pyeongchang,
Korea during the
2008–09 season. At the 2012 World Championships, Gregorin won the silver medal at the mixed relay, together with
Andreja Mali,
Klemen Bauer and
Jakov Fak. The Slovenian biathlete was the only competitor who failed the 2017 doping retests from the
2010 Winter Olympics. In October 2017, the
International Biathlon Union said that two samples given by Teja Gregorin tested positive for
GHRP-2, a banned substance which stimulates the body to produce more
growth hormone, in samples taken the week before competition started. She was disqualified in December 2017. ==Biathlon results==