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Determining boy or girl from the baby’s heart rate
Q: Does the baby’s heart rate tell you the baby’s sex?
A: There is no credible evidence suggesting a link between the baby’s heart rate and gender. Although most of my patients are eager to perpetuate this myth, it is just that. I know your grandmother or friend is 100% accurate using this method, but in reality they are only 50% accurate.

I’m always amused at how much credence my patients place in the heart rate. I have patients who have had an amniocentesis and would rather guess at the baby’s sex by using the heart rate than know the sex based on the amnio results. It is just one of those peculiarities of pregnancy that won’t go away!