This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Normal Puerperium, Subject name: Gynaecology & Obstetrics
Which of the following is not caused by Oxytocin 
Select and explain. 
A. Milk ejection, B. Lactogenesis, C. Contraction of uterine muscles, D. Myoepithelial cell contraction
B: Lactogenesis
Answer: B: Lactogenesis 
Explanation: Ans. B. LactogenesisOXYTOCIN causes contraction of the myoepithelial cells that line the ducts of the breast. This squeezes the milk out of the alveoli of the lactating breast into the large ducts and then Out of nipple (milk ejection) Oxytocin also causes contraction of smooth muscle of uterus.