Fetal Heartbeat Theory
Does It Really Work?
One old wives tale is based around using the baby’s heart rate as a predictor for what gender they will be. Who knows just how this little idea came to pass, but it has been around for a very long time.
This theory states that if the foetal heart rate is above 140 beats per minute (BPM), then the baby is more likely to be a girl. If the heart rate is below 140 BPM then the chances are that the baby will be a boy. The issue is, of course, what if the baby’s heart rate varies between 120-160 BPM? Having 3 or more readings of the same heartbeat is mos important for gender determination.