Oberstolz-Antonova finished 15th in the women's singles event at the 2002 Winter Olympics in Salt Lake City. At the following Winter Olympics, she was involved in a serious crash during the first run of the women's singles event and did not finish as a result.
Oberstolz-Antonova is married to fellow Italian luger Christian Oberstolz. She sat out the 2006-7 World Cup season, giving birth to a daughter, Alexandria, on 14 May 2007.