Press/Media: Expert comment
Dr Franciska De Vries, from the University of Manchester, is also involved in this project, which has quietly gathered momentum via social media.
She said she hoped it would develop into a "global network" of scientists who would support each other in research and to inspire young women to embark on careers in science.
"It's empowering for people to read that letter and to see the huge amount of signatures and support," Dr De Vries told BBC News.
"To share these feelings with a network - we have a voice."