This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'All of the following are placental hormones, EXCEPT: \nSelect and explain. \nA. Chorionic gonadotropin, B. Chorionic thyrotropin, C. Chorionic coicotropin, D. Chorionic calcitonin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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.', 'role': 'assistant'}]