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.
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.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.In the French dub of The Transformers: The Movie (but not in the TV series), both Starscream and Shrapnel were referred to as female, with Megatron calling Starscream "une imbecile" at one point (French articles are gendered), and Shrapnel referred to as "Mademoiselle".The reason for this gender-switch was never fully explained, though it is possible that Starscream's and Shrapnel's rather high-pitched voices were mistaken for women's voices.In the manga, Decepticon females make their first (yet still to this day very rare) appearance in official fiction as Esmeral (Deszaras's wife) and Lyzack (Leozack's sister).
Both show up to show the Autobots just what it is Deszaras and his crew have been fighting for all this time: their poor families back home.
There are some exceptions, most notably the recently introduced Strongarm and her distinctly boxy shape.
The main real-world reason for all this can be seen from IDW Publishing's plans to introduce more women in 2014.
This, however, has dropped away in more recent years as toy technology changes.
Numerous female characters from the Aligned and Movie lines would turn into motorbikes, giving them thinner, daintier dimensions in robot mode.
A female Transformer was created through the introduction of Minerva to the ranks of the Headmaster Juniors.