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
Most common cause of first trimester aboion is: UP 09; JIPMER 10; Kerala 11; AFMC 12; CMC (Vellore) 14; COMEDK 15
assistant
The correct answer is  Ans. Chromosomal defect