Assuming a strict diet and training schedule, there should be a limit to how much muscle growth the average person can expect within a given time frame.
To be more specific, lets assume the person has 70kg and just started to go to the gym 3 times a week. How much muscle (in kg) can be gained on average within a month? I am looking for a rough benchmark here because it obviously depends a lot on many other variables. I am also interested in the differences between men and women concerning muscle growth expectations.