Overview

The aims of this study are:

• To assess the performance of third-trimester ultrasound scan in the localization of intestinal structures (small bowel, gut, mesenteric vessels..) involved in malrotations with a higher-risk of volvulus compared to a gold standard based on fetal MRI.
• To describe normal meconium progression (ultrasound and MRI), prenatal anatomical variants of the fetal digestive tract, and interobserver agreement on prenatal ultrasound.

Eligibility

Inclusion Criteria:

• Pregnant women over the age of 18
• Good understanding of French
• Gestational age greater than or equal than 31 weeks
• Fetal MRI indication validated in multidisciplinary staff at weekly meetings of the Multidisciplinary Prenatal Diagnosis Center in Montpellier or Nimes
• Affiliation or beneficiary of a social security scheme
• Declaration of free and enlightened opposition

Exclusion Criteria:

• Complex fetal abdominal malformations responsible for difficult interpretation of imaging: heterotaxis with asplenia or polysplenium, diaphragmatic hernia, omphalocele, gastroschisis, digestive pathology, abdominal tumor, bladder exstrophy or megavessia.
• Fetal chromosomal abnormality
• Request for termination of pregnancy validated by a Multidisciplinary Pre-natal Diagnosis Center