| Summary: | Introduction: Placental dysfunction can originate fetal complications, intrauterine growth restriction and maternal complications, such as preeclampsia.
Objective: To identify the morphometric pattern of twin placentas and its relationship with chorionicity, newborn weight and placental malformations.
Methods: A descriptive study was carried out in a sample of 16 pregnant women with twin pregnancy, 25 placentas and 32 newborns. The variables placental malformations, type of placenta, presence of calcifications, newborn weight, placental weight, placental volume, placental diameter and placental thickness were studied; the association of newborn weight with the type of placenta and the presence of calcifications, placental malformations, as well as thickness, diameter, volume and weight, with the type of placenta was determined.
Results: There was a higher frequency of newborns with monochorionic placentas (60%) without the association being statistically significant; placental malformations were significantly related to placenta type, as well as newborn weight and the presence of placental calcifications, and placental thickness, diameter, volume and weight, with placenta type (p< 0.01).
Conclusions: Dichorionic placentas are more frequent and these have fewer malformations; there is a relationship between low newborn weight and the presence of placental calcifications, as well as between placental thickness, diameter, volume and weight, with the type of placenta.
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