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
1st  urge at micturition comes at -
assistant
The correct answer is  “The first urge to void is felt at a bladder volume of about 150 ml, and a marked seme of fullness at about 400 ml”.
- Ganong