this is a copy and paste from Inner Reflections, which explains somewhat the Muslim perspective on this and then historical reasoning behind women not attending the graveside.
//The most commonly referred to explanation for disallowing women to attend funerals was due to the loud wailing and improper conduct of beating themselves and tearing their hair/clothes that most engaged in – and this is the reason currently still used although it would be relatively obsolete and varying depending on the temperament and degree of control the individual has over themselves and their senses
The traditions state that the custom was to employ women who used to wail and bemoan the dead. It would seem if we accept the hadith, that this may have been the reason for any early prohibitions. It ought to be noted too that men are also prohibited from wailing and tearing their hair, etc. Once this was understood and became the law of Islam, there was no need to prevent either sex from attending a janazah in a graveyard………Therefore, a woman cannot be deemed as being too emotional to attend a funeral — be it in the mosque or the graveyard — for as I have pointed out, the prohibition is for both men and women if it is feared that they will deport themselves in a manner deemed improper in Islam.
The absence of any clear indication of the permissbility or impermissibility on this matter, as with other matters, is taken to indicate that if something is not explicitily stated to be disallowed/forbidden then it should not be hastily assumed or taken to be as such
….And we seem to forget that the Qur’an states: “…and He has clearly explained what is forbidden unto you.” If we cannot find a prohibition in the Qur’an, then no Imam — no single person — has a right to enforce any interdiction. May Allah guide us to do that which is correct.//