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: Pharmacology
Oxytocin causes all except: 
Select and explain. 
A. Lactogenesis, B. Milk ejection, C. Contraction of uterine muscle, D. Myoepithelial cell contraction
A: Lactogenesis
Answer: A: Lactogenesis 
Explanation: Ans. (A) Lactogenesis(Ref: Katzung 11/e p657; KDT 8/e p355)Important actions of oxytocin are:Contraction of uterine smooth muscle (directly by acting on GPCR and indirectly by release of PG and LTs).Milk ejection by contraction of myoepithelial cells surrounding mammary alveoli.At high concentration; anti-diuretic and vasopressor action can be seen.Note: Lactogenesis is the action of prolactin (not oxytocin)