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  • Title: Maternal, Fetal, and Neonatal Outcomes of Elective Fetal Reduction Among Multiple Gestation Pregnancies: A Systematic Review.
    Author: Raffé-Devine J, Somerset DA, Metcalfe A, Cairncross ZF.
    Journal: J Obstet Gynaecol Can; 2022 Jan; 44(1):60-70.e12. PubMed ID: 34411728.
    Abstract:
    OBJECTIVE: To review the existing literature on fetal and maternal health outcomes following elective pregnancy reduction. DATA SOURCES: MEDLINE, EMBASE, CINAHL, the Cochrane Database of Systematic Reviews, and the Cochrane Controlled Trials Register. STUDY SELECTION: Studies involving women pregnant with dichorionic twins, trichorionic triplets, or quadra-chorionic quadruplets who underwent elective fetal reduction of 1 or more fetuses to reduce the risks associated with multiple gestation pregnancies. DATA EXTRACTION: The main fetal health outcomes measured were gestational age at delivery, preterm birth, miscarriage, birth weight, and small for gestational age at delivery. The main maternal health outcomes measured were gestational diabetes, hypertensive disorders of pregnancy, and cesarean delivery. DATA SYNTHESIS: Of 7678 studies identified, 24 were included (n = 425 dichorionic twin pregnancies, n = 2753 trichorionic triplet pregnancies, and n = 111 quadra-chorionic quadruplet pregnancies). Fifteen studies (62.5%) did not report maternal health outcomes, while every study reported at least 1 fetal health outcome. Fetal reduction was associated with higher gestational age at birth, lower preterm birth, higher birth weight, and lower rates of small for gestational age infants and intrauterine growth restriction. No consistent pattern was observed for miscarriage and neonatal mortality rates. Following fetal reduction, cesarean delivery rates were lower in most studies. There were no appreciable trends with respect to gestational diabetes or hypertensive disorders of pregnancy. CONCLUSION: Fetal reduction reliably optimizes gestational age at birth and neonatal birth weight. Miscarriage rates and other adverse procedural outcomes did not increase following transabdominal reduction. Further research on maternal outcomes is needed given a paucity of information in the literature.
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