Is there a connection between gender and the baby's heart rate?

Predicting the gender of a baby is a fascination that has captivated people for a long time. Of the many beliefs surrounding this issue, one of the most popular is to use the baby's heart rate to determine the gender of the fetus. The basic theory is that a baby boy will have a heart rate of less than 140 beats per minute, and a girl will have a heart rate of more than 140 beats per minute. Although this theory is widely believed, there is no scientific evidence that there is a connection between gender and a baby's heart rate.

A baby's heart rate actually varies during pregnancy. During the first few weeks of pregnancy, the baby's heart rate closely matches the mother's heart rate, or an average of about 85 beats per minute. This rate slowly increases by an average of about three beats a day. After about five weeks, the heart rate of male and female babies has increased to about 175 beats per minute, and this average then slowly declines for the rest of the pregnancy. Research has shown that the difference between the average male fetal heart rate and the average female fetal heart rate is very small, less than half a beat per minute, leading researchers to conclude that there is no correlation between fetal heart rate and gender.

A fetal heart rate is classified as normal when it falls between 110 beats per minute and 180 beats per minute. A baby's heart rate can also change throughout the day. A baby who is active or moving will generally have a higher heart rate than a baby who is still or sleeping. Therefore, a higher baby heart rate is actually more indicative of the baby's activity level than its gender.

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