This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
[{'content': 'During labor and delivery, a specific hormone causes uterine contractions. This hormone is produced in which one of the following anatomical locations? \nSelect and explain. \nA. Hypothalamus, B. Anterior pituitary, C. Posterior pituitary, D. Adrenal cortex', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The hormone that causes uterine contraction is OT. OT (and VP) are produced in the hypothalamus, then stored in the posterior pituitary. The anterior pituitary produces PRL, LH, FSH, ACTH, GH, and TSH. The ovary produces progesterone and estrogen. The adrenal cortex produces cortisol.', 'role': 'assistant'}]