Not only the word "woman" but even "female" may not be used anymore to refer to female people i.e. women, because it would exclude transgender males, and "erroneously" include transgender females.
https://twitter.com/PennyRed/status/840283430113931264
Laurie Penny, "journalist, author, feminist, nerd" and contributing editor to New Statesman, with 164K followers on Twitter, has asked what word may be used for people who "have a uterus and all that".
https://twitter.com/kitemonster/status/840320725869252608
https://twitter.com/kitemonster/status/840321008334585856
One person suggested using the term "gestational bodies" to refer to women's bodies, supporting also the term "menstruators" (see next).
http://www.feministcurrent.com/2016/09/07/are-we-women-or-are-we-menstruators/
Planned Parenthood has used the term "menstruators" to refer to women who menstruate, to avoid implying that only women menstruate. Some men and "nonbinary" people also menstruate, you see.
http://68.media.tumblr.com/03dd3c98ba09cf93a47d0f8b4b39c23d/tumblr_ncyld9J3fN1tm163xo1_1280.jpg
According to the web comic Assigned Male, 5.8K followers on Twitter, 106K Likes and 105K followers on Facebook, a person's body is of the sex they identify with. In other words, a penis is a female organ if it belongs to a transwoman.
https://twitter.com/DanielleMuscato/status/839611526998818817
Danielle Muscato, ~100K followers on Twitter, says that some women have penises and that if you can't get over that you should suck his dick.
http://everydayfeminism.com/2017/02/trans-women-not-biologically-male/
https://www.youtube.com/watch?v=eWVRzGMVXbM
It has become a popular, mainstream position in transgender activism to claim that biological sex is a social construction.