title: Recommendations on routine mid-trimester anomaly scan.
abstract: The purpose of this paper is to discuss the minimal requirements of the routine mid-trimester anomaly scan in Asian countries after taking into account various factors, including local circumstances, medical practice, guidelines, and availability of experienced sonographers and high-resolution ultrasound machines, which affect the prenatal detection rate of fetal anomalies. In general, a routine mid-trimester anomaly scan includes the assessment of the number of fetuses, fetal cardiac activity, size, anatomy, liquor and placental location. The most controversial issue is which fetal structures should at least be examined. We discussed the requirements of a basic routine scan, as well as the optional views, which can be obtained if feasible to improve the detection of fetal, placental or maternal abnormalities. Routine anomaly scan remains a clinical challenge.
authors.affiliation: Department of Obstetrics and Gynaecology, Queen Elizabeth Hospital, Hong Kong, SAR.
authors.forename: Kwok Yin
authors.initials: KY
authors.lastname: Leung
authors.forename: Chung Fan
authors.initials: CF
authors.lastname: Poon
authors.forename: Angelita R
authors.initials: AR
authors.lastname: Teotico
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Hata
authors.forename: H S
authors.initials: HS
authors.lastname: Won
authors.forename: Ming
authors.initials: M
authors.lastname: Chen
authors.forename: Apichart
authors.initials: A
authors.lastname: Chittacharoen
authors.forename: Jaideep
authors.initials: J
authors.lastname: Malhotra
authors.forename: P K
authors.initials: PK
authors.lastname: Shah
authors.forename: Azen
authors.initials: A
authors.lastname: Salim
mesh_terms: D001208:Asia; D005260:Female; D005324:Fetal Movement; D005333:Fetus / Q000002:abnormalities*; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal
keywords: congenital anomalies; fetal structures; fetal ultrasonography; prenatal diagnosis; ultrasound