Does NIPS always accurately tell me the gender of my baby?

No! Fetal sex or gender, just like every other part of NIPS, is considered a screening test. While this is by far the most accurate part of NIPS, false results do occur. If you do receive an incorrect fetal sex prediction through NIPS, which is usually noticed at your 20 week ultrasound, do not panic. This does not necessarily mean anything is wrong with the baby. There are many reasons NIPS can predict the incorrect fetal sex or gender.