Associations between non-registered ultrasound examination in pregnancy and adverse perinatal outcomes in immigrant and non-immigrant women: a Norwegian population-based study 1999–2016

Prenatal ultrasound examinations are important to detect placental dysfunction. Several ultrasound-detected abnormalities can be managed during pregnancy or childbirth, thus improve health outcomes. Maternal birth country is known to influence the risk of placental dysfunction, but little is known about the possible mechanisms of this relation.