Prenatal third trimester sonographic behavior of a thanatophoric dwarfs.

Objectives: Thanatophoric dysplasia (TD), the most common of the congenital lethal skeletal dysplasias occurs sporadically in 1/64,000-100,000 live births. To the best of our knowledge, the in utero attitudes and behaviours of such babies with serial ultrasound scans have not been previously described. We present the in utero third trimester sonographic behaviors of TD in a 22-year-old primigravida diagnosed at '32weeks' gestational age along with the clinical and radiographic characteristics.