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Placental Aetiologies Of Foetal Growth Restriction: Clinical And Pathological Differences
Home ‹ 2011 Abstracts ‹ Placental Aetiologies Of Foetal Growth Restriction: Clinical And Pathological Differences

Background: Placental morphology and pregnancy outcome differ between normal pregnancies and those with foetal growth restriction (FGR). Most reports do not differentiate
among different placental injury patterns related to foetal growth restriction.

Aims: To evaluate placental and perinatal findings in growth restricted pregnancies based on three placental injury patterns: maternal and foetal blood supply abnormalities,
and villitis of unknown aetiology, compared to those of preeclampsia (PE) and normal pregnancies.

Study Design: Retrospective review

Subjects: 65 growth restricted newborns and their placentas.

Outcome measures: Comparison of the clinical perinatal characteristics and outcomes, placental pathology and the number of syncytiocapillary membranes in the
terminal villi, of the 65 FGR cases with 13 pregnancies complicated with preeclampsia (PE), and 25 uncomplicated pregnancies as controls, at 34-40 weeks gestation.

Results: The most common injury patterns of FGR placentas were maternal underperfusion (66%)(group1), foetal blood supply abnormality(17%)(group2), and villitis of
unknown aetiology (17%)(group3). The rate of induced labours was the highest in group 1 but the rate of operative deliveries due to suspected foetal asphyxia was the highest in group 2 (p<0.05). In the FGR cases, inverse relationship was found between birth weight and the number of syncytiocapillary membranes (r=-0.31, p<.05) in the maternal underperfusion FGR cases(group 1) only.

Conclusions: The different injury patterns in placentas of FGR patients may be correlated to different clinical outcomes. Placental examination in FGR pregnancies can
provide a specific pathophysiologic explanation that may recur in subsequent pregnancies and lead to changes in follow-up and management.

Authors”

Aviram R, Biron Shental T , Kidron D.

Meir Medical Centre, Kfar Saba

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