Swedish parties need to win 4 percent of the vote before they can get a seat in the country's Riksdag and the Feminist Initiative as it is known in Sweden has now reached that target.
Previous pre-election surveys by the Dagens Nyheter newspaper and polling body Ipsos suggested the Feminist party had the support of around 3 percent of voters.
The party's key message is that Sweden’s image as a tolerant, equal society is not a reality and it is campaigning to abolish sexism. It wants tougher action to ensure equal pay for women and to cut domestic violence.
Backed by ABBA's Benny Anderson and led by former Left Party head Gudrun Schyman, the party is also in favour of a six-hour work day and wants mothers and fathers to split parental leave evenly.
Sweden's Soraya Post is Europe's first feminist MEP. Photo: TT
The Feminist Initiative made history earlier this year when Swedes voted in the EU’s first feminist MEP, Soraya Post.
It has been making gains in Sweden's big cities and among young voters.
But with a week to go before national elections, many Swedish voters remain undecided and there is no guarantee that the latest poll offers an accurate prediction of the result.
"It would be tough for the Feminist Initiative to enter parliament but not impossible", said David Ahlin, Survey Manager at Ipsos.
Thursday's survey also revealed growing support for for the Greens who are now attracting 11 percent of voters and the Left party which is currently at 7.4 percent in the polls.
Sweden's center-left opposition parties' lead over the governing coalition remained stable over the past week. If there was an election now, the Social Democrats, Green and Left parties would get a combined 48.1 percent of votes.
Party Voter support Change from latest poll*
Social Democrats 29.7 -2.4
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Left Party 7.4 +0.8
Green Party 11.0 +0.9
Moderates 21.7 -0.4
Centre Party 4.4 -0.7
Liberal Party 6.3 -0,1
Christian Democrats 4.5 +0.5
Sweden Democrats 9.7 +0.1
Feminist Initiative 4.0 +1.0
* Change measured in percentage points