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
All of the following are placental hormones, EXCEPT: 
Select and explain. 
A. Chorionic gonadotropin, B. Chorionic thyrotropin, C. Chorionic coicotropin, D. Chorionic calcitonin
D: Chorionic calcitonin
Answer: D: Chorionic calcitonin 
Explanation: 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.