I’m torn. I also think it means it’s for women only. And had they advertised it as women/female only, it would probably put a target on their heads for being challenged. Sadly for them, I think “womb-space” will still be interpreted by some men as including them, even though I’m pretty sure they mean the space where a womb used to be.
So, points for attempting to have a women only class, marks off for presentation and unwomanly word use.