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
Sex can be determined by all except -
assistant
The correct answer is  Pelvic brim is more spacious and circular in females, coccyx is more movable and preauricular sulcus is more frequent and broad and deep in females. In males, pelvic brim is hea shaped, preauricular sulcus is narrow and coccyx is less movable. ref : Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27th edition pg. 32.