I have no idea what she means. I don't think you missed a thing. I saw no reference to menstruation here or in any of her other fanfic. The bottom line is that Edna dislikes prufrock's love's work on principle while admiring her skill. Edna reserved the right to complain about anything that didn't meet her narrow specifications. It's a quirky approach to reviewing to say the least but I miss her anyway.