Why do you have to talk about women's issues?
I'm confused.
Did they email you and specifically ask for a talk on women's issues, gender in the workplace, or anything like that?

If they did, then I understand your worries.

But if they didn't specifically ask about women or gender issues, then just do whatever you'd do for a bunch of men.

My eyebrows are stuck at 'frowning with confusion mode.'
:D