David Reardon has been researching these issues for a good 30 years that I know of. He is probably the foremost expert in the field of emotional response to abortion trauma.
Its becoming common for ardent feminists to brag about their abortions. For women who have had abortions but have other children, it is not such a good idea to make such “boasts”. Their surviving children never look at their mothers quite the same. They come to believe that their mother for whatever reason killed one of their siblings.