Is a fetus cisgender or transgender before birth?

Literally, we don't know. There's research into the causes of Gender Dysphoria that suggests that there may be genetic factors that influence a child's development to be either cisgender or transgender. read more

There’s research into the causes of Gender Dysphoria that suggests that there may be genetic factors that influence a child’s development to be either cisgender or transgender. There have been research efforts that suggest that prenatal environmental factors can impact development in a way that impacts gender identity. read more

The theoretical issue of ectopic pregnancy (pregnancy outside the uterine cavity) by implantation in persons assigned male at birth has been addressed by experts in the field of fertility medicine, who stress that the concept of ectopic implantation, while theoretically plausible, has never been attempted and would be difficult to justify – even for cisgender women lacking a uterus – owing to the extreme health risks to both the parent and child. read more

Transgender is when there is a mismatch between the gender I was assigned at birth and/or the gender of rearing, and now all of them match. Transition doesn't change your assigned-at-birth gender, so you're still trans in my book. That doesn't make you less legitimate, though. read more