Transgender metamorphosis, according to a study conducted by a protégé of renowned neuroscientist Vilayanur S. Ramachandran, is when a person undergoes a change in sexual identity, often multiple times a day. Meaning, you go to sleep identifying with one gender and wake up feeling, thinking, and identifying with the other.
Some of the men and women who participated in the study reported that their sexual identity can switch involuntarily back and forth several times a day, accompanied by the "sensation of phantom breasts or genitalia of the non-biological sex." One female participant said, "I sometimes wake up thinking I have a penis or that I have no breasts…I usually end up in tears and I can't get out of bed...It's strange though because I normally don't even want to have a penis."
This "new form of transgenderism" has been tentatively named AGI, or alternating gender incongruity:
[It] describes the involuntary change of gender identity, along with perceived phantom sex characteristics, a tendency toward ambidexterity and bipolar disorder, all signs that suggest a biological basis for AGI. (A related term, bigender, defined as blending or alternating gender states, precedes AGI.)
More research is sure to follow, as results on the initial study were "suggestive but not conclusive."