There are several possibilities for localized intestinal echo enhancement, intestinal meconium and amniotic fluid, fetal intestinal malformations, and fetal chromosomal abnormalities. Most of them are intestinal meconium and amniotic fluid, and the strong echoes are transient and usually disappear after 2 weeks of review, between 34 and 38 weeks of gestation.
Enhanced fetal intestinal echogenicity is a common transient abnormality on ultrasound, which is not necessarily a fetal abnormality per se, and usually disappears between 34 and 38 weeks of gestation. However, fetuses with this manifestation have an increased risk of intestinal malformations and suffering from chromosomal aneuploidy, and should be reviewed to rule out the abnormality under the supervision of an obstetrician.
Similar ultrasound manifestations, which in themselves do not have a significant effect on the fetus, but indicate an increased risk of fetal aneuploidy are called soft ultrasound indicators, in addition to the thickening of the nuchal folds, mild widening of the lateral ventricles, and intraventricular punctate echoes, etc., such abnormalities do not need to be overly concerned if they appear on obstetrics examination, but they should be consulted with obstetricians in a timely manner.