Female sex roulette
Well, I remember bringing up that question early on with Hasbro, "are any of these female?
" And then I think Hasbro's attitude was, 'this is a boy toy.
A female Transformer was created through the introduction of Minerva to the ranks of the Headmaster Juniors.
The transtector she was bonded to eventually evolved into a being of her own.
Shockwave at various points expresses surprise they aren't extinct, which would seem to imply females were thought to be no longer part of the Cybertronian race.
While at the time a decent (though certainly not perfect) explanation for the scarce appearances of female Transformers, it didn't stop more females from showing up in the movie and season 3.
Despite the double gender, Overlord is regarded a "he".
Just how relationships function in this isolated, media-based Transformers society is unclear, although it's notable that Wreck-Gar and his lady friend "slept" sitting up next to each other on giant thrones between television broadcast cycles.
The lady's character model is actually that of a female Lithone, another mechanical race, but whether this is meaningful in any way or simple model recycling is uncertain.
A list of female Transformers from all continuities is available. Both terms have recently appeared in a piece of official fiction: Venus magazine.
This is the first instance "mech" has been used to specifically refer to a male Transformer, whereas the term has been used as a gender-neutral common noun for Transformers in various stories.