This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology in Relation to Reproduction, Subject name: Gynaecology & Obstetrics
Which hormone is not affected by menstrual cycle - 
Select and explain. 
A. Estrogen, B. Progesterone, C. Gonadotropins, D. Prolactin
D: Prolactin
Answer: D: Prolactin 
Explanation: Ans. is 'd' i.e., Prolactin o Prolactin levels do not fluctuate much during the menstrual cycle.