Regarding Cybernetic Serendipity at least one woman exhibited there. 
Margaret Masterman (with Robin McKinnon-Wood) of the Cambridge Language
Research Unit showed their "Computerised Haiku".

  -there's more - Google "Computerised Haiku"

I was under the impression that Vera Molnar also was there but looking
through her Bio see that she only began doing computer-based work in 1968 -
so possibly was too late to be included?

The gender issue has been an ongoing part of the computational arts debate
since it's earliest days.  Brenda Laurel has been a commentator: