To explore the application value of systematic prenatal ultrasound in prenatal screening of twin pregnancy.

Retrospectively analyzed 393 cases of twin pregnancy who underwent systematic prenatal ultrasound examination in our hospital from October 2012 to December 2017, and 27 cases of twin pregnancy malformation were included in the study. By comparing the data of prenatal ultrasound examination with follow-up data and pathological anatomic results, the detection rate and diagnostic coincidence rate of fetal malformation in prenatal screening of twin pregnancy by systematic prenatal ultrasound examination were analyzed.

Among 27 cases of twin pregnancy malformation, 19 cases were fetal structural malformation and 8 cases were unique malformation of twin pregnancy. Nineteen cases of twin pregnancy fetal structural malformation occurred in one of the two fetuses in twin pregnancies, and all of which were single malformations. Eight cases of unique malformation of twin pregnancy were often involved in double fetuses. Seventeen cases of fetal structural abnormalities and 8 cases of unique malformation of twin pregnancy were diagnosed correctly by systematic prenatal ultrasound examination, and the diagnostic coincidence rate of prenatal ultrasound was 100% (25/25). Two cases of structural malformation were missed, and the detection rate of fetal malformation was 92.6% (25/27).

The systematic prenatal ultrasound in prenatal screening of twin pregnancy has high detection rate of malformation and diagnostic coincidence rate, which has important clinical application value.