As a rule, but not always , each of us incarnates every 800 years which number has gone down since the so called original 2100 years which is halved for as a rule, but not always, we will incarnate in a male body followed by a female body; therefore halved to 800-1000 years.
Neither the alternation in genders or time spans are fixed as we incarnate as a function of our particular qualities and needs ; both ours and mankind's.
If the female ovum were every to flourish , on its own, it would expand into nothingness for it cannot, alone deal with the earthly.
Likewise if the male sperm were to attempt to flourish, on its own, we would have a crass corruption akin to a garbage debris .
The female gender is indeed somewhat cosmic whereas the male gender is more telluric. this in no way means that one should go about classifying and passing legislation for peoples based upon gender.
The work appears to be the ability to see the individual without classification as to gender, skin, nation, tribe or family affiliation; meeting your neighbors as human beings for all the previous are no more than the cloaks of Men, likened to coming out of the water when wet, the wetness is not the Man.