I cannot go this year and requested deferal from the two schools I got offer. But I did not get the deferal. Yesterday, on my way to airport, I finally decided not to go . I decided to re-apply this year.
I've heard many were rejected for deferal last year. I've known 2 got deferal from HBS & Wharton for maternity leave. It seems to me that it is hard to get it from top bschools and it is decided case-by-case.