Is it better to have the minor anomaly scan at 28 weeks or at 32 weeks?

Generally, the minor anomaly scan is performed between 28 and 32 weeks of pregnancy.

The minor anomaly scan is a routine ultrasound examination, serving as a second detailed scan during the late second trimester following the major anomaly scan in mid-pregnancy, aimed at detecting fetal abnormalities. The major anomaly scan should be conducted at 22–24 weeks of gestation, while the minor anomaly scan is typically scheduled between 28 and 32 weeks. This period falls within the late stage of pregnancy, when fetal growth and development are more pronounced. Any abnormalities in the fetus can thus be more accurately identified. The content of the minor anomaly scan is essentially the same as that of the major scan, involving a systematic evaluation of all fetal organs to gain a more comprehensive understanding of fetal development and to prevent missed diagnoses. Certain late-onset or newly developed anomalies may only become detectable during this second screening. Performing both scans helps maximize the detection of fetal abnormalities, and the minor anomaly scan generally serves as a supplementary examination to the major anomaly scan.

Pregnant women are advised to attend regular prenatal check-ups, actively cooperate with medical evaluations arranged by their doctors, clearly monitor fetal development in utero, and prepare adequately for delivery.