This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
[{'content': 'A female child presents with vaginal bleeding for 4 days after birth, what is to be done? \nSelect and explain. \nA. Wait and watch, B. Estrogen, C. Bleeding time, D. Factor deficiency screening', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Wait and watchREF: Shaw 13th ed p. 48Repeat from December 2009"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"', 'role': 'assistant'}]