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The effects of azathioprine on birth outcomes in women with inflammatory bowel disease (IBD).
Journal of Crohn's & Colitis 2011 June
AIM: To investigate the effects of azathioprine/6-mercaptopurine (AZA/6-MP) on birth outcomes in women with inflammatory bowel disease (IBD).
METHODS: Details of pregnant women with IBD were obtained through an ObstetriX Database in 3 major teaching hospitals in Sydney from 1996 to 2006. Medical records were reviewed. Birth outcomes of interest were single live births, low birth weight (LBW) at term (<2500 g), preterm births (<37 weeks gestation), neonatal adverse outcomes, and congenital anomaly. Placental blood flow during third trimester of pregnancy was measured using arterial Doppler ultrasonography, where available.
RESULTS: All women had IBD diagnosed before pregnancy. 19 births were exposed to AZA/6-MP. 74 births that were never exposed to AZA/6-MP were selected as controls. Preterm birth was seen in 26.3% of the exposed group as compared to 13.5% of controls (p<0.001). However, in univariate analysis, preterm birth was not associated with AZA/6-MP (OR=2.28; CI: 0.67-7.73). There was 1 neonatal adverse outcome in the exposed group as compared to 4 in controls (5.3% vs 5.4%, p=0.97). One congenital anomaly was seen in each group (p=0.27). No LBW at term was seen in either group. Placental blood flow in 4 women exposed to AZA/6-MP was normal.
CONCLUSION: The use of AZA/6-MP during pregnancy in IBD women was not associated with an increased risk of preterm birth, LBW at term, neonatal adverse outcomes and congenital anomalies.
METHODS: Details of pregnant women with IBD were obtained through an ObstetriX Database in 3 major teaching hospitals in Sydney from 1996 to 2006. Medical records were reviewed. Birth outcomes of interest were single live births, low birth weight (LBW) at term (<2500 g), preterm births (<37 weeks gestation), neonatal adverse outcomes, and congenital anomaly. Placental blood flow during third trimester of pregnancy was measured using arterial Doppler ultrasonography, where available.
RESULTS: All women had IBD diagnosed before pregnancy. 19 births were exposed to AZA/6-MP. 74 births that were never exposed to AZA/6-MP were selected as controls. Preterm birth was seen in 26.3% of the exposed group as compared to 13.5% of controls (p<0.001). However, in univariate analysis, preterm birth was not associated with AZA/6-MP (OR=2.28; CI: 0.67-7.73). There was 1 neonatal adverse outcome in the exposed group as compared to 4 in controls (5.3% vs 5.4%, p=0.97). One congenital anomaly was seen in each group (p=0.27). No LBW at term was seen in either group. Placental blood flow in 4 women exposed to AZA/6-MP was normal.
CONCLUSION: The use of AZA/6-MP during pregnancy in IBD women was not associated with an increased risk of preterm birth, LBW at term, neonatal adverse outcomes and congenital anomalies.
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