Thanks to modern technology, we don’t have to visit the old wise lady in the village to learn the sex our baby anymore. Instead, we can go to the hospital and get an ultrasound.

Even though the chromosome combination of your little one is determined at the moment of conception, their genitalia will not start to develop until around nine weeks. You will also probably have to wait about 20 weeks for an anatomy scan.

There are several at-home “tests” you can do, though! Let’s find out if some of the most popular at-home sex tests actually work.

Popular Tests to Know the Sex of the Baby at Home

The Baby’s Heart Rate

There is a common myth that if the heart rate of your unborn baby is above 140bpm, then it is a girl, and if it’s any lower, then it’s a boy. In reality, there are actually no significant contrasts between the heart rate of the sexes during pregnancy. 

An embryo’s heart rate begins at around 75bpm, and then it increases each day for the first month. It will reach a peak of around 180bpm. It will then reverse in the middle of the pregnancy, where the average heart rate will be about 120bpm

A study in 1999 found that female fetuses have a much higher rate during regular labor than male fetuses. We still don’t know the reason for this, though. 

Shape of the Bump

The myth for this one says that if your bump is a ball shape, then it’s a boy, but if it’s spread out, then it’s a girl. In reality, while boy babies generally develop heavier than girls, it will only affect the size of the bump, not the shape. 

The appearance of your pregnant stomach will depend entirely on your body shape and the positioning and weight of the baby. If the baby has their back positioned to the outside of the tummy, then the bump will protrude outward, but if the baby has it’s back closer to the mother’s back, the bump will be flatter.

Click here to learn everything you need to know before your baby arrives! 

Morning Sickness

This myth states that women who have more intense morning sickness will have a girl. There might actually be some truth to this, as a study including more than 1 million pregnancies between 1987 and 1995 found that hyperemesis gravidarum was more likely to occur in the first trimester for women who were pregnant with a female child.

Later studies also backed up these findings, but we are still not certain about what causes morning sickness. Click here to learn how to deal with morning sickness. 


This myth has us believe that the baby will be a girl with plenty of hair if the mother suffers heartburn during the pregnancy. The truth is that heartburn is quite a common pregnancy complaint.

It occurs when the developing uterus pushes on the stomach, which causes stomach acid to move your esophagus. Another cause is the change in hormones, which can disturb the digestive system and stomach. 

Linea Nigra

This myth says that if the Linea Nigra runs below the belly button, then the mother is having a girl, but if it runs above, then it’s a boy. Linea Nigra is a kind of skin hyperpigmentation that about 75% of women experience, and it is said to be caused by changing hormones. 

It is more common in mothers with darker skin. There is no evidence to support that it helps determine the sex of the baby. 


This is one of the most common myths, and it would have you believe that you can dangle your wedding ring, attached to a string, over a pregnant stomach to predict the sex. It is one of the more fun wives’ tales, but the only thing the wedding ring can predict is the wealth of the baby’s parents

Mother’s Sleeping Position

This myth says that if the mom sleeps on the left, she will have a boy, but if she sleeps on the right, she will have a girl. In fact, this tale is so ridiculous that scientists have not even attempted to examine the connection between the sex of the baby and the mother’s sleeping position. 


This myth claims that if the mother craves dairy and sweets, then she’s carrying a girl, but if she’s craving spicy, salty, or sour foods, then she’s having a boy. Food cravings are actually one of the more enigmatic aspects of pregnancy. 

Even though many women will stand by the fact that they crave certain foods when pregnant, we still aren’t sure if there’s any scientific evidence to back the existence of pregnancy cravings. 

Popular Tests to Know the Sex of the Baby at Home


Have you ever tried one of these old wives’ tales? They’re fun to think about, but the truth is, many of them do not have any basis in science, and they generally aren’t trustworthy.