Since the pandemic shutdown began, journal submissions of co-authored papers, with women among the co-authors, are slightly up, and solo-authored papers by women are significantly down. https://www.insidehighered.com/news/2020/04/21/early-journal-submission-data-suggest-covid-19-tanking-womens-research-productivity
Update: Gender Inequality in Research Productivity During the COVID-19 Pandemic
https://arxiv.org/abs/2006.10194
https://arxiv.org/abs/2006.10194
Update https://www.timeshighereducation.com/news/pandemic-lockdown-holding-back-female-academics-data-show
Update. "Men and women have been disproportionately affected [by the pandemic]; for many [research] outputs, women were about 10 percentage points more likely than men to have decreased work." https://sr.ithaka.org/blog/what-about-research-scholarship-and-covid-19/
Update. "Our female respondents reported larger declines in the time they could devote to research than their male colleagues. And scientists with young children appear to have been particularly hard-hit, especially women." https://www.nature.com/articles/s41562-020-0921-y
Update. "The proportion of #COVID19 papers w/ a woman 1st author was 19% lower than...for papers pub'd in the same journals in 2019...Women’s representation as 1st authors of COVID-19 research was particularly low for papers pub'd in March & April 2020." https://elifesciences.org/articles/58807
Update. "Comparing 2020 with 2019, there was a 4% reduction in the percentage of women first authors [in @JAMASurgery], a 6% reduction of women last authors, and a 7% reduction in women as corresponding author." https://jamanetwork.com/journals/jamasurgery/fullarticle/2769186
Update (from April). "Six weeks into widespread self-quarantine, editors of academic journals have started noticing a trend: Women...seem to be submitting fewer papers." https://www.thelily.com/women-academics-seem-to-be-submitting-fewer-papers-during-coronavirus-never-seen-anything-like-it-says-one-editor/
Update. "Women are advising policymakers, designing clinical trials, coordinating field studies and leading data collection and analysis, but you would never know it from the media coverage of the pandemic." https://www.timeshighereducation.com/blog/women-science-are-battling-both-covid-19-and-patriarchy
Update. Summarizing some of the research in this thread. https://www.scientificamerican.com/article/women-in-science-may-suffer-lasting-career-damage-from-covid-19/