The chances of an error with ultrasound are up to 5 percent, says Schaffir. An ultrasound can be between 95 to 99 percent accurate in determining sex, depending on when its done, how skilled the sonographer is and whether baby is in a position that shows the area between their legs. Mistakes can also be made.

How often is ultrasound gender wrong?

With proper expertise and equipment, ultrasounds can correctly predict the gender of the baby 95 percent of the time, said Dr. Iffath Hoskins, vice chair of patient safety and quality in the department of obstetrics and gynecology at NYU Langone Medical Center. Theyre especially good at predicting a boy.

Can you still be pregnant with a negative ultrasound?

A pregnancy that doesnt show on an ultrasound scan is called a pregnancy of unknown location. The most common reasons for a pregnancy not appearing on the ultrasound scan are: it is too soon to see the baby on the scan. you have had a miscarriage.

What percentage of gender ultrasounds are wrong?

Table 1Gestational age11–11+6 weeks12–12+6 weeksIncorrect male3/814%Correct female10/1686%Incorrect female5/165%Total correct when attempted13/2189%5 more rows•31 Dec 2015