An impossible choiceVan Kempen tried to negotiate with her gender reassignment medical team to retain some of her sperm and genetic material when she began to consider transitioning in 1992.Her questioning the law, in an effort to be able to eventually have biological children, nearly caused the medical team to reject her candidacy for surgery, she wrote in a post on Transvesie's Facebook page last year."I had to choose transition or fertility," she wrote in the post.After years debating marriage and children versus gender reassignment surgery, Van Kempen transitioned in 1996 when she was 37.Van Kempen's desire to have children did not wane.