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
The cutoff point of serum estrogen level for the diagnosis of ovarian failure:
assistant
The correct answer is  Diagnosis of menopause is from classical symptom of hot flush (50%) confirmed by elevated FSH levels to more than 100 mlU/ml and serum estradiol < 20 pg/ml.