Many (I would assume most?) women shave most all parts of their body before going to the mikveh (arm pits, legs, many take care of the hairs on their face to look nicer or to remove them altogether.) In regards to pubic hair however are there any sources that say a woman must remove this hair? Or are there any minhagim (customs) that mandate a woman must remove this hair before going to the mikveh. Or perhaps there is another reason for removing this hair altogether that is not only related to the reasons of beauty, personal hygiene, etc. I'm speaking of reasons either according to halacha, minhag, perhaps Kabballah, etc.
I've heard that the Sephardim are quite careful to remove these hairs. Is it a reason according to halacha or minhag? I've heard as well that it is possibly it a practice al pi kabballah.
I'm looking for authoritative sources or reasons behind this in either case if such a practice exists.