So in a Breathwork session clients report oceanic feelings of bliss (a good womb) or a toxic womb (environmental toxins e.g. tobacco or alcohol) or a 'toxic' emotional environment.
So whilst Freud and the psychoanalytic movement tended just to focus on post-natal biography and the Freudian individual unconscious, discovering the perinatal aspect of ourselves process opens up a major door to healing distortions in our nervous systems. In my own case, I uncovered lots of repressed rage, even though on the outside I was a very nice guy. I traced this back to my high forceps delivery and being 'forced' out of the birth canal.
So when we undertake Breathwork, we can tap into some 'unremembered' areas and bring it up for processing and healing.