This method identifies about 75% of affected fetuses while screening about 5% of pregnancies.

A nuchal scan is a sonographic prenatal screening scan (ultrasound) to help identify higher risks of Down syndrome in a fetus, particularly for older women who have higher risks of such pregnancies.

Conclusion It is of great significance to carry out premarital screening of thalassemia for protect the health of the youths and the fetus also be screened after birth for detection of thalasemia.