Let me give you some examples. Some women start noticing that they are leaving out letters when they write, or reversing them. Some say that their reading skills are changing, they are reading less than they used to for unknown reasons. Some say that they reverse words when they read, or make questions out sentences that aren't questions. Some women forget how to do simple arithmetic will their usual facility.
Some women start to drop things more.
Most people don't link these to hormone changes. But I've interviewed over 160 women and I asked them what symptoms they associate with menopause. Women told me strange things which I didn't really believe were true at first. And they said they did. Also, when women start taking estrogen many of the memory, speech and other symptoms get remarkably better.