• J. Korean Med. Sci. · Feb 2004

    The distribution of fetal nuchal translucency thickness in normal Korean fetuses.

    • Jin-Hoon Chung, Jae-Hyug Yang, Mi-Jin Song, Jeong-Yeon Cho, Young-Ho Lee, So-Yeon Park, Myoung-Jin Moon, Ha-Jung Lim, June-Seek Choi, Joo-Oh Kim, Joong-Sik Shin, Hyun-Kyong Ahn, Jung-Yul Han, Moon-Young Kim, Kyu-Hong Choi, and Hyun-Mee Ryu.
    • Department of Obstetrics and Gynecology, Samsung Cheil Hospital and Women's Healthcare Center, Sungkyunkwan University, School of Medicine, Seoul, Korea.
    • J. Korean Med. Sci. 2004 Feb 1; 19 (1): 32-6.

    AbstractThe aim of present study was to establish normative data for the distribution of nuchal translucency (NT) thickness in normal Korean fetuses. The data were collected from pregnant women with singleton pregnancies in whom fetal ultrasound was performed and the fetal NT thickness was measured between 11 and 14 weeks of gestation. Among them, a total of 2,577 fetuses with a known normal outcome were included in this study. The distribution of multiple of median (MoM) values of the NT thickness with crown-rump length (CRL) in 10-mm intervals and the 95th percentile of MoM were calculated with the linear regression method. The present study showed that NT measurements increase with increasing CRL and a false positive rate increases with increasing gestational age. Therefore, a fixed cut-off point through the first trimester was not appropriate and each NT measurement should be examined according to the gestational age. The present study offers normative data of the fetal NT thickness in a Korean population, which can be used as reference for screening chromosomal aberrations or other congenital abnormalities in the first trimester.

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