I am very curious about this because before I was born the doctors thought that I was going to be a girl. This was in the late 1980s so of course it was a lot more difficult to tell back then but I just wonder was it possible that they detected something that would relate to abnormally low androgen levels for a male child etc? I have always been curious about this because how would they be able to gender a child back then if they were unable to see a penis or vagina from the angle that the ultrasound was taken. Somehow I think perhaps there is something they knew back then. Is there a difference between the heart rate of a male or female heart rate or subtle bio clues like that. Also I was born a cesarean section and my mom was older and had toxemia at the time. I just wonder what any of these things could have contributed to me being born transgendered.

As far as i know, there is no difference between male and female heart beats. However i think the female babies heart- beats faster than a male baby during delivery. I believed that method was used a few years ago before the new technology they use now. They believed that female fetuses had a faster heart beat than males so they thought that determined the sex of a baby, but i dont think it was relevant. And maybe the fact that you'r mom was older had something to do with the ->-bleeped-<-, older women do have more complications and stuff but not all so its not a for sure thing. Same with toxemia. And actually the same thing happened with me when my mother was pregnant i was born in late 1990 so idk about that specific time but doctors thought i was going to be a boy and i even got a whole bunch of boy stuff for my baby shower, but i turned out to be a girl haha.

I was apparently positioned backwards...? or i think something like that was the story. The doctors said i was going to be a girl right until the moment i was born, though. And i am a girl... but the doctor still said i was a boy when he pulled me out. Stupid. But my parents were completely surprised when i was born that i was male.  I was also C-sectioned out, but that was because of my awkward choice in positioning before i was born.

It wasn't a doctor's guess, but my dad was convinced I was a girl.

I don't think he expected to have to wait this long to see his daughter's face though.

i was also a C-Section, and my doctors thought i going to be a girl! i wonder if being a c-section baby has something to being transgender?

I think the doctors thought I was a boy - it would make sense because they did have ultrasound in 1989. Normal delivery, no C-section. But if that was true, I guess I don't know why my parents had both a boy name and a girl name picked out...

I think boys often get recognized as girls (but not the other way around) because the "male parts" are what are used for the differential diagnosis. i.e. you don't see a penis, it must be a girl.

They didn't or so my mom says. She says she waited to see what came out... 

I don't think that it had anything to do with the doctors, but everyone around my mother was convinced that she was going to have a girl, even going to far as to give her typical girly baby gifts, and she had picked out a girl name: Jennifer.

I'd thought that perhaps it would have been a nice gesture toward my mother to take that name when I started transition, since I was going to be Jennifer anyway originally. But, I think that there are way too many Jennifers around. It was at the time of my birth the most popular girl's name in the US. Plus now I have a stepsister the same age, named Jennifer, and it would only cause confusion.