The 2021 Women's Six Nations tournament is set to be pushed back and start in April due to coronavirus crisis.
The tournament was set to begin on the same weekends as the men's event, which begins on 6 February.
"A lot of work is being done on the planning of the Women's Six Nations Championship factoring the updated and fast-evolving measures in each country," said a Six Nations spokesperson. "We will communicate in due course."
The competition is a key part of teams' preparations for the World Cup, which is due to take place in New Zealand from mid-September.