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P.T. Cohen-Kettenis


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Department VUmc:Medical Psychology
Position:

CONTACT
Name : Peggy Cohen-Kettenis
Department  : Medical Psychology and Medical Social Work
Position   : Head Department Medical Psychology and Medical Social Work

CURRICULUM VITAE
Peggy Cohen-Kettenis is the head of the department of medical psychology and director of the center of expertise on gender dysphoria. She is a registered clinical psychologist and psychotherapist. She started her research in the field of gender dysphoria with the first Dutch study evaluating the treatment of adult patients with gender identity disorders. This study would be the ground for a new Dutch law allowing transsexuals to adjust their birth certificates. From 1987 to 2002, she worked at the Department of Child and Adolescent Psychiatry of the University Medical Center Utrecht. Here, she initiated the first clinic for children and adolescents with gender dysphoria and disorders of sex development in Europe. This clinic moved to the VU University Medical Center in 2002 and became part of the larger center of expertise on gender dysphoria.
Peggy Cohen-Kettenis participated in the development of the guidelines of the ESPE/LWPES (the European and American Societies for Pediatric Endocrinology) for diagnosis and treatment of Disorders of Sex Development, the Standards of Care for Gender Identity Disorders of the World Professional Association for Transgender Health, the guidelines on the Endocrine Treatment of Transsexuals of the Endocrine Society, and she is currently the chair of the American Psychiatric Organization’ s DSM-V Subworkgroup on Gender Identity Disorder.
Her areas of research are disorders of sex and gender development, and sex hormone- behaviour relationships.

CURRENT PROJECTS
- Effects of pubertal delay in adolescent transsexuals on psychological functioning and psychiatric comorbidity
- Effects of pubertal delay and cross-sex hormone treatment on brain structure and functioning of adolescent transsexuals
- Abnormal sex hormone exposure of the brain; possible neuroendocrine implications for cognition in adult transsexuals and women with polycystic ovarian syndrome
- Psychosexual development of children with gender identity disorder: a long-term longitudinal study
- Cognitive functioning, psychological well-being, and sexual functioning after long term estrogen treatment in the aging MtF transsexual
- Long term outcome on gender identity, sexual functioning and psychological well being in patients with a disorder of sexual differentiation: a multi-center study
- Prenatal versus postnatal influences of sex hormones on the development of gender identity development: an (f)MRI study

KEY PUBLICATIONS 
 Van de Beek C, van Goozen SHM, Buitelaar JK, Cohen-Kettenis PT. Prenatal sex hormones (maternal and amniotic fluid) and gender related play behavior in 13-month-old infants. Arch Sex Behav (2009) 38  6–15

Sommer IE, Cohen-Kettenis PT, van Raalten T, van der Veer AJ, Ramsey LE, .Gooren LJ, Kahn RS, Ramsey NF. Effects of cross-sex hormone treatment during language and mental rotation: An fMRI study in transsexuals. Eur Neuropharmacol (2008) 18  215-221

Wallien MSC,  Cohen-Kettenis PT. The psychosexual outcome of gender dysphoric children. J Am Acad Child Adolesc Psychiatry ( 2008)  47 1413-1423

Hulshoff Pol HE, Cohen-Kettenis PT,  van Haren N, Peper JS, Brans RGH, Cahn W, Schnack HG, Gooren LJ, Kahn RS. Changing your sex changes your brain: Influences of testosterone and estrogen on adult human brain structure. Eur J Endocrinol ( 2006) 155, Suppl 1: S 107-114

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