Yes, まあ for admiration, astonishment or surprise is generally used by wemen, however, まあ for "wel...", "then...", "all right/OK..." is used by everyone.
Here are other words now come to my mind that "in general" is used by wemen:
suffixes: かしら、なの、よね、なのよね、だわ
words like "well.../let me see...": そうね、どうかしら
for admiration or astonishment: あら、あらあら、あらまあ
About the words only for men, since they don't sound good, they are used by wemen, especially by young girls. However, in the formal form, there are few words for "only men".
I think there are more but now I don't remember them. I hope other people write more words.