My son's is always high sometimes low. Last week he was in the 150's
I have three girls an the bpm was never lower then 164 with my first her bpm at 8 weeks was 186 it was super fast..
Today I heard my baby heartbeat and it was 154 but I don't know the sex yet I am 13 weeks and 5 day's.
Mines was 140, now is 150 and I'm having a girl
My sons has been 150-160 and he's a boy.