No its all old wives tales
Mine was 156 at 8 weeks and I'm having a girl :)
I'm 30 weeks now and her last heart rate was at 143 :)
I'm having a boy and it has stayed between 118-140's ! Anxious to find out do the Chinese baby calendar (gender chart) that thing has been accurate not only for me but for ALL of my friends !
Mine at first was 120 nd its a boy.
What is the Chinese baby calendar? lol
They say that boys heart rates are always lower than girls and normally stay under 140. Girls normally run about 160. and the Chinese gender calendar is a chart that you enter your information in an ssupposeto predict rather your having a boy or girl its not 100 percent accurate but you can google it and try it
I did it & it said girl ... So we'll see if it's right in like 10 weeks lol.