Danish author, daughter of a veterinarian in Farsø and sister to Danish author Johannes Vilhelm Jensen. She was married from 1912-1918 to the painter Gustav Fenger.

She wrote about erotic and social themes and fought for women's rights.

In 1924 she founded the 'Foreningen for Seksuel Oplysning', the Organization for Sexual Awareness, in which Dr. Leunbach performed abortions. She was personally against abortion, but felt that women needed to have a choice. She was highly criticized for this belief.

Her literary work includes:

• 1903 - To Søstre
• 1905 - Martyrium
• 1907 - Prins Nilaus af Danmark
• 1913 - Højeste Ret
• 1915 - Stærkere end Tro
• 1916 - Jydske Historier
• 1918 - Gerd - det tyvende Aarhundredes Kvinde
• 1919 - Den erotiske Hamster
• 1924 - Frivilligt Moderskab
• 1925 - Aphrodite fra Fuur: den moderne kvindes udviklingshistorie
• 1926 - Børnebegrænsning. Hvorfor - hvordan?
• 1929 - Storken
• 1931 - Jørgen Lykke: rigens sidste ridder
• 1934 - Nial den Vise
• 1936 - Stygge Krumpen
• 1940-53 - Romanserien om Valdemar Atterdag, Drotten, Rigets arving og Atter det skilte
• 1950 - Erindringerne Hvorfra? Hvorhen?
• 1954 - Den sidste Valkyrie