I use female and male as a sex designation. Only females can be impregnated, only females can give birth, etc.
The reason why they have pushed sisters to hate their own sexual designation is so that their attempts to confuse gender and sex can take hold. So they try to argue that using female is derogatory since it reduces them down to their sexual organs, but really they just don't want you to be able to easily bypass the lie that transwomen are real women by using the correct sexual terminology. They rather force people to use othering language (cis) to psychologically make people think both circumstances are natural when one is definitely not a natural state of existence (trans).
They been pushing the line too tuff tho and have began to alienate their allies.
Theres a whole segment of feminists, lesbians, regular degular women and even their O.T.'s that are fed the fukk up with them. People who fall into those categories are pushing back now and no longer backing their plays.
As another poster pointed out in a different transformer thread, its the M to F's stirring up all the trouble not the F to M's. With all the in fighting, alienating allies, contradictions in their goals and beliefs amongst each other, the rampant mental illness and general fukkery, its really only a matter time before the "trans movement" self implodes.