I couldn't tell you about the rest of the world in terms of publications, but if you read any publication by Vincent Larivière, I'm sure you will find that women publish less than men.
I think it's a question of choice. This is something that nobody has really had a look at. Many women will take the decision to not write another paper over the weekend because they want to be driving to ski lessons or swimming lessons. I think the question of choice is something that we don't have on our radar. Everywhere in the world, women publish less than men.