Detailed Instructions: Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Q: Question: Is late follicular progesterone to estradiol ratio influenced by protocols or gonadotropins used?
Answer: Endometrial receptivity is determined by the complex interactions of E2 and P.
A:
no