Thingybob
I don't consider myself a proper feminist, although I agree with many feminist objectives, as I can't buy into the denial of innate psychological differences between the sexes. If I've raised my concerns previously I get shouted down with waffle about socialisation and patriarchy and told this is a fundamental feminist belief.
I agree that there has previously been quite a lot of hostility on this board to this subject. It's been a silver lining to the trans fiasco that so many new voices have been drawn to the board, that it's now become possible to discuss it. I was so pleased to see this thread.
For me, the most important thing is to keep an open mind. There is no conclusive evidence at the moment, even though we may feel the evidence points in a particularly direction.
I bought the blank slate theories completely when I was young (was at Uni in the 70s, when they were at their height). Not just on feminism, but other social/political issues as well. That changed after my first child was born. I didn't have any particular maternal felings during pregnancy, which meant I was utterly shocked by the huge psychological changes that I experienced in the space of 24 hours after she was born, when my priorities and attitudes were simply turned upside down (in a good way, but still astounding to my rational self). I was stunned by the revelation that biology could be so powerful, which went against all my previous beliefs. It made me wonder: if innate factors can be so psychologically powerful here, what other things might they potentially influence, rather than just socialisation?
That was in 25 years ago, and led me to start reading, and the more I read the angrier I got at having been so misled in my whole worldview by ideologically based wishful thinking, wishful thinking that I was coming to see had no scientific basis. I felt I had been duped. This affected my attitude toward feminism, as well. I still saw myself as a feminist, but felt my ideas generally would no longer be acceptable to most feminists.
I came to Mumsnet a few years ago now, so relatively recently, but these feelings made me react very negatively to reading some of the more dogmatic voices that used to dominate these threads, to the extent that I really didn't want to participate in discussions at all. Reading this thread, it's good to see that I wasn't alone in those feelings.
Reading about the trans issue has made me revisit my feminist principles. My core understanding, gained right at the beginning, that it is differences in biology that have led to women's oppression, has been reaffirmed. But I feel strongly now that any kind of social activism absolutely should not be based on pre-conceived, ideologically based ideas. We saw where that went with the blank slate-ism of Marxism, and the subsequent disillusionment and loss of focus of the left.