what is the average heart rate for a baby boy in the womb?
The average heart rate for baby boys in the first trimester was 154.9 bpm (plus or minus 22.8 bpm) and for baby girls it was 151.7 bpm (plus or minus 22.7 bpm). In other words, this myth is busted. There was not a significant difference between male and female heart rates during early pregnancy.