From 1919 she studied at the Toonkunst music school in Utrecht and her first compositions – three songs, a string quartet, and three piano pieces survive from 1920. In 1921 she wrote a second quartet, a piano quintet, a parody opera, and a pastorale for orchestra. In 1925 she completed only a piano trio and a choir piece. Insecure and disillusioned she decided to stop composing. She took an office job and composed only sporadically.
In October 1938 Stants married Leendert Sillevis from Culemborg, a widower fourteen years older than her. She began to compose again: a concerto grosso for flute, cello and string orchestra in 1940 and a suite for small orchestra in 1942.
After the Second World War Stants dedicated herself to music education and related social activities. Among other things, she became active as a board member and in the cultural and spiritual committee of Het Nederlandse Padvindersgilde (Dutch Girl-pathfinders Guild).. She died on 3 February 1968.
- (in nl) Tijdschrift van de Vereniging voor Nederlandse Muziekgeschiedenis. Vereniging voor Nederlandse Muziekgeschiedenis. 1986. p. 196. https://books.google.com/books?id=Nk4yAAAAMAAJ. Retrieved 2018-12-17.
- "Stants, Hendrika Henriëtte Cornelia (1903–1968)" (in nl). 2018-10-04. http://resources.huygens.knaw.nl/vrouwenlexicon/lemmata/data/Stants. Retrieved 2018-12-17.
- (in nl) De schalmei. Nederlandsche Padvindstersgilde, Den Haag. 1948. p. 231. https://resolver.kb.nl/resolve?urn=MMKB14:002764022:00021. Retrieved 2020-12-14.
- (in nl) De padvindster. Nederlandsche Padvindstersgilde, Den Haag. 1949. p. 20. https://resolver.kb.nl/resolve?urn=MMKB14:002452001:00028. Retrieved 2020-12-14.