I mean I can say for the us, 35 years ago my bachelors program for microbiology had a majority of men but there were still a lot of women. 30 years ago in a PhD they accepted 4men and 4woman but one guy never showed, another dropped mid first semester, another dropped between semester, and I dropped mid second semester. As of that time all four women stayed in the program but I know one was thinking of switching (non of the men continued to seek a doctorate). I worked in diagnostic assays a bit but saw the same thing. More women to begin with and guys left in droves. Most got mbas and did managagement or went for tech jobs.
I mean I can say for the us, 35 years ago my bachelors program for microbiology had a majority of men but there were still a lot of women. 30 years ago in a PhD they accepted 4men and 4woman but one guy never showed, another dropped mid first semester, another dropped between semester, and I dropped mid second semester. As of that time all four women stayed in the program but I know one was thinking of switching (non of the men continued to seek a doctorate). I worked in diagnostic assays a bit but saw the same thing. More women to begin with and guys left in droves. Most got mbas and did managagement or went for tech jobs.