system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Extended definition of perinatal moality includes crown heel length of?
assistant
The correct answer is  Body length of atleast 35 cm should be used for perinatal moality rate.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-519