A 3 year, prospectively-designed study of late selective multifetal pregnancy reduction

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Abstract
The aim of our study was to evaluate the pregnancy outcomes of late selective multifetal reduction (MFPR). We performed a 3 year, prospectively-designed study in which 28 patients underwent MFPR at a mean gestational age of 20.2 +/- 3.9 weeks (range 14-29 weeks). The indications for MFPR included: multiple gestation (> or = 3) (57%), structural anomaly (29%), and chromosomal abnormality (14%). The procedure was performed using ultrasonographically-guided intracardiac injection of potassium chloride. The mean gestational age at delivery was 36.6 +/- 2.2 weeks (range 31-40 weeks). Nine patients (32%) delivered before 36 weeks of gestation. The mean birth weight was 2370 +/- 614 g (range 1510-3250 g). Discordancy was evident in four twins (14%), and intrauterine growth retardation in four pregnancies. One case (3.5%) presented with oligohydramnios, and one with pregnancy-induced hypertension. One case of late abortion due to passive cervical dilatation 4 weeks after the MFPR was observed. Procedure-related amnionitis followed by late abortion occurred in one case. A total of 57% of the patients delivered vaginally and 43% delivered by Caesarean section. We concluded that late selective MFPR is associated with favourable perinatal outcome. Late MFPR may facilitate the detection of structural and chromosomal anomalies prior to the procedure, and the accomplishment of selective reduction of the affected fetus.

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