heart beats 💗 theory

Nesdely • My family is everything. Mother of three blessing and god just bless us with baby number four as our New Years 💑👪👩‍👦
Hello all my ladies on here expecting 
How many you you believe in the heart beat theory for predicting gender. 
I don't believe in any of the theory, but my husband family kept asking me what my baby heart rate was and during the ultra sound it was 159bpm and my check up it was at 156bpm they keep telling me because of my baby rate I am having a girl lol...I did the Ramzi theory and nub theory through gender experts and they predict boy for both. I feel it's a boy but my husband family thinks it's a girl because of the heart rate
I know every baby can be different but my boys were lower then this one 
Any one else have any thoughts 💭 on baby rate 
Thanks