We don't have information that would allow us to estimate the total value of foregone income. The labour force survey provides information about women's work and their place in the labour market. The survey also obtains information about the absence of women in the labour market. However, we do not have information about the financial losses this could represent. It's a question of research—one that we should focus on.
On December 10th, 2020. See this statement in context.