This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetus & New Born and their Diseases, Subject name: Gynaecology & Obstetrics
Most common cause of vaginal bleeding in neonate is? 
Select and explain. 
A. Sarcoma botryoides, B. Birth trauma, C. Bleeding disorder, D. Hormone withdrawal
D: Hormone withdrawal
Answer: D: Hormone withdrawal 
Explanation: ANSWER: (D) Hormone withdrawalREF: Shaw 13th ed p. 48"Vaginal bleed may be noticed in neonates in first week, it is due to withdrawal of maternal estrogen circulating in the newborn circulation. No treatment is needed except for reassurance"