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Perinatal outcomes of women with Müllerian anomalies

Si Wang, Kana Wang, Qing Hu, Hua Liao, Xiaodong Wang,
Published: 15 April 2022

Abstract: Purpose: To investigate the perinatal outcomes of singleton pregnant women with Müllerian anomalies (MuAs). Methods: A retrospective cohort study was conducted on singleton pregnant women with MuAs who delivered at the West China Second University Hospital between January 1, 2009 and December 31, 2020. Results: Four hundred fifty-seven cases of MuAs were identified, with an incidence of 0.40%. The most common anomaly was a septate uterus (38.7%). Compared to the control group, the MuAs group had significantly higher incidences of perinatal complications, including preterm deliveries (PTDs) (27.4 vs. 9.8%, P < 0.001), preterm premature rupture of membranes (PPROM) (29.1 vs. 22.5%, P = 0.001), malpresentation (34.4 vs. 5.6%, P < 0.001), abruptio placentae (4.6 vs. 1.2%, P < 0.001), placental accreta/increta (19.7 vs. 11.8%, P < 0.001), and uterine rupture (2.8 vs. 1.6%, P = 0.035). The rates of in vitro fertilization and embryo transfer (IVF–ET), foetal growth restriction (FGR), and low birth weight were also significantly higher in the MuAs group (8.3 vs. 4.5%, P < 0.001; 2.6 vs. 0.9%, P = 0.001; 3.1 vs. 1.7%, P = 0.033, respectively). In the MuAs group, the incidence of PPROM was high in cases with unicornuate uterus (31.5%), and malpresentation was as high as 42.4 and 37.0% in cases with septate and didelphys uteri, respectively. Conclusion: The data suggest that pregnancy with MuAs may increase adverse perinatal outcomes, which calls for intensive supervision during pregnancy and delivery to reduce maternal and foetal complications. Individualized considerations should be emphasized according to the different categories of MuAs in pregnancies.
Keywords: Müllerian anomalies / Perinatal outcomes / Singleton pregnancy / Perinatal complications / Preterm delivery / Malpresentation

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