jack turban.the founding director of the gender psychiatry program at the university of california, san francisco. dr. tobin, thank you for joining us. let's begin with the basics. gender identity. sex assigned at birth. what do they mean, and how are they different? dr. jack turban: so gender identity is your psychological sense ofourself in terms of masculinity and femininity. it's extraordinarily complicated, and we know from research that there is a biological basis of how we think about ourselves in terms of gender, but then we interact with society and culture to create this really complex understanding of who we are and how we think about ourselves. sex assigned at birth also it could be based on your unfortunately complicated. chromosomes based on different sex organs. but generally there are these biological characteristics, that end up being on your birth certificate. when i say sex assigned at birth i'm usually referring to what's , on someone's birth certificate. john: when there is co