Based on multidisciplinary work with a French team involved in uterus transplantation research and experience in a hysterectomy clinic, the author proposes to explore some of the unconscious issues of this emerging technique. The testimony of the uterus transplantation candidates shows an over-investment of the pregnancy as evidence and substantiation of womanhood. This leads them to accept an unusual path to become, potentially, a mother: carrying their baby-to-be in a temporary womb.