I cant remember if it's 140 or 160 that is used. i.e. over 160 girl and below is boy.


I also recall reading its more in the later stages of preg rather than early. I never get told the heart beat, i am not sure if the doppler they use has it on a screen or not at my ob. I always mean to ask but forget when i hear that heartbeat sound cause it doesn't matter all of a sudden.