I don't know the specifics on that, it would be difficult to imagine a greater time, number and opportunity than right now for female participation into science.So we can see that in current day women also make important contributions to science.
Was the ratio in ancient times higher?
Also remember often achievements in science are 'team' efforts, there have been considerable female science input to teams, 'behind the scenes'..
The point is about having your passion for science and following through, or if I want to breed/train bulls and horses, or just happy to work with kids, which actually can be very rewarding....society does not have the numbers on the ground of science types, so generally speaking there are lack of bums in labs. I will find the best estimated figures of science type people in populations to show you an idea how rare the science bird (meaning male and female) are. Those with the predisposition to science, (male and females-starting from kids) need our understanding and support, encouragement.Lise Meitner (7 or 17 November 1878 – 27 October 1968) was an Austrian-born, later Swedish, physicist who worked on radioactivity and nuclear physics. Meitner was part of the team that discovered nuclear fission, an achievement for which her colleague Otto Hahn was awarded the Nobel Prize. Meitner is often mentioned as one of the most glaring examples of women's scientific achievement overlooked by the Nobel committee. A 1997 Physics Today study concluded that Meitner's omission was "a rare instance in which personal negative opinions apparently led to the exclusion of a deserving scientist" from the Nobel. Element 109, Meitnerium, is named in her honor.