<prompt> All of the following are placental hormones, EXCEPT:Chorionic gonadotropinChorionic thyrotropinChorionic coicotropinChorionic calcitonin  <response>: Many hormones are secreted by the syncytiotrophoblast of the chorion, and a few additional hormones are produced by the decidual cells. Placental hormones include, Chorionic gonadotropin Chorionic thyrotropin Chorionic coicotropin Estrogens Progesterone Prolactin Placental lactogen Ref: Paulsen D.F. 2010. Chapter 23. Female Reproductive System. In D.F. Paulsen Ed, Histology Cell Biology: Examination Board Review, 5e. 