Friends and family may point out signs of having a girl or boy, but most of these will probably be based on folklore rather than science.
An ultrasound at 20 weeks into the pregnancy is the most reliable way to tell a baby’s sex.
This article discusses some of the traditionally held signs that someone is having a girl, as well as whether they have any scientific evidence to support them.
Eight signs of having a girl
We look at the science behind eight traditional signs of having a girl:
1. Severe morning sickness
Some people think that severe morning sickness is a sign of having a girl. In fact, recent research suggests that feeling ill during pregnancy may be linked to the baby’s sex.
A 2017 study found that women carrying girls experienced more inflammation when their immune systems were exposed to bacteria compared to those carrying boys.
This difference may impact the way women carrying girls experience morning sickness. They may feel more unwell than those carrying boys.
More research is needed to fully understand if there is a link between morning sickness and a baby’s sex.
2. Extreme mood swings
Hormonal changes during pregnancy can often cause mood swings. Some people think that women carrying girls have higher levels of estrogen and are moodier as a result. Research does not support this theory, however.
Hormone levels rise during pregnancy and fall after giving birth regardless of whether the baby is male or female.
3. Weight gain around the middle
If a woman gains lots of weight around her middle during pregnancy, some people think this means she is having a girl. They may also believe that gaining weight just in the front of the body indicates a boy.
Again, scientific evidence does not back up this theory. Where a woman gains weight in pregnancy depends on her body type.
4. Carrying the baby high
Carrying the baby high is an often-repeated sign of having a girl. Despite its popularity, this has no scientific basis.
Where a woman carries her baby depends on her:
- body type
- weight gain
- fitness level
- muscle strength