Task: Answer Verification
Input (English): Question: Are physical and biomechanical characteristics of rat cervical ripening consistent with increased collagenase activity?
Answer: The changes in physical properties of the rat cervix during physiologic ripening are similar to those induced by PGE(2) and RU486, and consist of increased extensibility, compliance, and strength. These changes cannot be attributed to increased collagenase activity, which would decrease tissue compliance and strength.
Output (English): no