Is it a boy or a girl?

Little girls will steal your beauty?

The myth. According to legend, girls steal away their mothers’ beauty. However, a pregnant woman can thank the child growing inside her if she becomes more attractive during her pregnancy.

The same woman can appear differently at various stages of her pregnancy—glowingly beautiful one day, but exhausted and worn out the next—and there is no evidence to support this.

How babies’ genitalia develop and ‘nub theory’

Tiffany’s not the only woman to whom this has happened. I actually had a similar experience. At around twelve weeks, an ultrasound to check for Down syndrome revealed that I was most likely having a boy. Your baby’s gender is determined at the time of conception, when the sperm contributed a Y chromosome, which creates a boy, or an X chromosome, which creates a girl. However, we could clearly see during the 20-week ultrasound that my daughter was most definitely not a boy! The genitalia of boys and girls develop in the same way, with no obvious signs of gender until about nine weeks. The genital tubercle starts to transform into a penis or clitoris at that point. However, you won’t be able to clearly see the differentiated genitalia until 14 or 15 weeks. Blood tests to check for specific conditions can tell us gender after nine weeks, so how can we predict gender before then? Based on the angle of the genital tubercle at 12 weeks, ultrasound may be used to identify the gender. This is sometimes called “nub theory. The sonographer uses this technique to determine the gender of the unborn child by observing whether the tubercle is pointing up toward the baby’s head, indicating a boy, or whether it is flat or points down, indicating a girl. A 2016 study looked at the accuracy of such tests. The researchers discovered that out of 672 cases, 90% of the time sex determination was possible and the prediction was accurate. Although those percentages may appear to be quite high, it’s not as simple as it seems.

Oily skin and dull hair

Some people think that a woman may be carrying a girl if she has oily skin and dull hair.

This belief is not scientifically based.

On the other hand, adjustments to diet or hormonal changes during pregnancy may be related to variations in oil production or hair appearance.

Some individuals think that if a baby’s heart beats quickly, they might be a female.

However, researchers debunked this myth decades ago in a study that found no significant difference between the heart rate in male and female fetuses.

The doctor’s ultrasound scan at 20 weeks is the best time to determine a baby’s gender.

During the scan, the physician will examine the baby’s genitalia to determine their sex. Although usually true, there are a number of factors that can make the ultrasound difficult to see.

The doctor can also carry out the following procedures to obtain a conclusive response:

Typically, a doctor will only suggest these procedures if they are worried about the baby’s health.

Most anecdotal indicators of having a girl are urban legends that demand dispelling.

Preconception stress and excessive morning sickness may increase the likelihood that a woman will give birth to a girl, but more research is required to fully understand how these factors affect a baby’s sex.

Asking the doctor’s advice at the 20-week ultrasound is the most practical way to determine a baby’s sex.

Last medically reviewed on January 18, 2020

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