Yeah it is. I am interested to know lol
With my daughter, her BPM were over 140 and I carried her high. Those are both 'signs' of having a girl, but I truthfully think it's just coincidence... It's really fun to speculate though.
There is no scientific correlation between bpm and gender but it is always fun to guess. My lo has a bpm of 168 so it'll be fun to see if the tales are true. My app isn't till the end of October.