While it is still unclear, changes in gender that correlate with the menstrual cycle could be caused by how hormone levels naturally rise and fall during menstruation. Menstrual cycle and its effect on gender fluidity Other genderfluid people are sometimes able to use their willpower to guide their gender to change in a way and/or at the time that they want it to. Some move from one gender to the next on a regular cycle, resembling a lunar cycle, or synchronizing with their menstrual cycle. Other genderfluid people find that their gender changes depending on the situation and is influenced by inside or outside sources. They find that their gender fluidity is unpredictable and happens randomly. Some genderfluid people find that no outside or inside things tend to influence their gender identity to change. Usually, gender fluidity happens by itself, so that a person feels like, say, a girl at a certain time, rather than choosing to be a girl at a certain time. I guess I just have mixed feelings about it. Sometimes, when I'm feeling a certain way, like if I'm currently masculine, I wonder to myself, 'What if I don't change from this? What if I'm not genderfluid and just a transboy?' But I always change again, and it's cool and weird. In 2018, Washington state began to allow 'X' gender markers on official documents, with the law stating that In 2015, added an entry for 'gender-fluid,' which it defined as an adjective meaning 'noting or relating to a person whose gender identity or gender expression is not fixed and shifts over time or depending on the situation.' It listed as synonyms genderfluid, gender fluid, and gender-flexible. In 2014, 'Gender Fluid' was one of the 56 genders made available on Facebook. In 2012, JJ Poole (tumblr user thoughtstoberemembered) created what would become the most widely-used genderfluid flag. In 2010, the Gender-Fluid community was created on LiveJournal. The earliest extant entry for 'gender fluid' in the Urban Dictionary was added in 2007. Earlier than that, they may have called themselves cross-dressers. In the 1990s and 2000s, it might have been more common for genderfluid people to call themselves bigender or genderqueer.

Gender fluidity is becoming commonly known as transgenderism: the ability to transcend gender, whether biological, emotional, political, or otherwise truly mixing male and female. Gender-fluid means that their gender identity and/or expression encompass both masculine and feminine. The word 'genderfluid' has been in use since at least the 1990s, albeit with a somewhat different meaning. Gender fluidity recognizes no borders or rules of gender.'

Gender fluidity is the ability to freely and knowingly become one or many of a limitless number of genders, for any length of time, at any rate of change. If ambiguity is a refusal to fall within a prescribed gender code, then fluidity is the refusal to remain one gender or another. Kate Bornstein mentioned gender fluidity in 1994, in the book Gender Outlaw: On Men, Women and the Rest of Us, 'and then I found that gender can have fluidity, which is quite different from ambiguity. 4 Gender fluidity and dissociative identity disorder.2.1 Menstrual cycle and its effect on gender fluidity.It's important to understand that each person has the right to decide what to call their gender identity. Some people with fluid genders use other labels such as genderqueer, bigender, multigender, genderfae, polygender, etc. Some people who experience fluid gender don't use the word 'genderfluid' for themselves. To be easy to read, this article uses the word 'genderfluid' for all people who experience fluid gender. Some genderfluid people regularly move between only a few specific genders, perhaps as few as two (which could also fit under the label bigender), whereas other genderfluid people never know what they'll feel like next. For some genderfluid people, these changes happen as often as several times a day and for others, monthly, or less often. A genderfluid individual's gender identity could be multiple genders at once and then switch to none at all, or move between single gender identities, or some other combination therein. Genderfluid individuals have different gender identities at different times. Genderfluid aka Gender-fluid, Gender Fluid, or Fluid Gender, is an identity under the multigender, nonbinary, and transgender umbrellas. I've come to find that I'm either a woman or something close to being a man, but not quite there.

Non binary vs gender fluid