How soon can you find out your baby’s sex?
The formation of the vulva or penis starts occurring by the 6th week of pregnancy. Female and male fetuses look quite similar during the first-trimester ultrasound until about the 14th week of pregnancy.
There is a theory, called the Ramzi theory, that suggests that you can predict the sex of a fetus by as early as the 6th week of pregnancy by looking at the placement of the placenta on an ultrasound image. The theory says that it’s possible to tell the sex of a fetus by checking which side of the uterus the fetus is on. Nevertheless, there’s no scientific evidence to support this method.
You can also find out the sex of your baby by having noninvasive prenatal testing (NIPT), a blood test, which is usually done between 11 and 14 weeks of pregnancy.
Genetic testing methods such as amniocentesis or chorionic villus sampling (CVS) can also reveal the sex of your baby. Health care providers generally perform CVS between the 11th and 14th weeks of pregnancy and amniocentesis, between the 15th and 20th weeks. These tests are primarily done when the health care provider suspects fetal abnormalities, and the tests pose certain risks. Experts don’t recommend these tests only to determine the sex of the fetus.
You can find out if the fetus is male or female during an ultrasound done between the 18th and 22nd weeks of pregnancy. By the 18th week, your health care provider may be able to determine the sex of your baby if they are lying in a position that makes their genitals visible. If the health care provider can’t see the fetus’s genitals clearly, they may not be able to tell the sex for sure.