Ultrasonographic measurements of the fetal neck correlated with gestational age

Ultrasonographic examinations were performed on 121 normal fetuses between 15 to 40 weeks of gestation to measure the fetal neck. The area (FN-A), circumference (FN-C), anteroposterior diameter (FN-APD) and transverse diameter (FN-TD) of the fetal neck correlated well with the gestational age, respectively. Ultrasonographic measurements of the fetal neck in utero are thus new parameters to evaluate the fetal growth and identify the abnormality of the fetal neck in utero.