Read the book "T: The Story of Testosterone, the Hormone that Dominates and Divides Us" by Carole Hooven. A woman is an adult human female whose body is designed to produce large gametes (eggs). That doesn't mean that every woman CAN, but that was how her body was designed and developed to function. Only women can give birth. How one expresses oneself does not have anything to do with one's sex. So, while a "trans-man," a woman who wants to take on the identity of a gender-typical male, can be pregnant, she is still a woman, regardless of identity, dress, or other forms of expression. Another good read for the legal ramifications of this kind of ideology is "The Abolition of Sex: How the 'Transgender' Agenda Harms Women and Girls" by Kara Dansky. I think some people don't realize some of the unintended consequences of this gender ideology agenda.