My 2 oldest were girls and had high heart rates . My two youngest are boys and both had lower heart rates . This last baby has been high and will see Saturday if the wives tale is right again. I know they say 50/50.
I've had two girls and two boys. My girls hr we're 150 and 160s and boys 130s and 140s. I'm pregnant with my 5th and hr is in 160s. I'll find out in March if is a boy or girl.
It's a myth. The baby could have just been really active at that point to have a higher beat or really chill to have a lower. The heart beat can't tell you anything really besides the baby is healthy.