You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Most common site for the initiation of otosclerosis is - and explain in detail?
Most common type of otosclerosis – Stapedial otosclerosis
Most common site of otosclerosis – Fissula ante fenestram (i.e. just in front of oval window)
Most common site for stapedial otosclerosis – Fissula ante fenestram (i.e. just in front of oval window)
Most common site for cochlear otosclerosis – Round window

Ref. Dhingra 5/e, p 97-98, 6/e, p 86-87