WHAT'S KNOWN ON THIS SUBJECT:Aspirin given to the mother in high-risk pregnancies seems to produce a moderate reduction of several different risks such as preeclampsia; delivery before 37 weeks of gestation; and fetal growth restriction.
WHAT THIS STUDY ADDS:A low dose of prenatal aspirin treatment was not associated with adverse neonatal or long-term outcomes.abstract OBJECTIVE: Low-dose aspirin (LDA) given during pregnancy may alter brain development in very preterm infants. We report the short-and long-term outcomes of very preterm infants according to LDA treatment. PATIENTS AND METHODS: Data were from the Etude Epidemiologique des Petites Ages Gestationnels (EPIPAGE) cohort study, which included all infants born before 33 weeks of gestation in 9 French regions in 1997. This study was restricted to 656 children who were born to 584 women with an obstetric history of placental vascular disease or with chronic hypertension or renal or autoimmune diseases. The main outcome measures were mortality, cerebral lesions, and outcome at 5 years of age, which were measured by a diagnosis of cerebral palsy; behavioral difficulties, which were assessed with the Strength and Difficulties Questionnaire; and cognitive impairment, which was measured by the mental processing composite scale of the Kaufman Assessment Battery for Children (an IQ-equivalent measure of cognitive ability in 2 dimensions: sequential and simultaneous processing scores). RESULTS: LDA treatment was administered to 125 of 584 (21%) mothers and was not significantly associated with mortality, cerebral lesions, cerebral palsy, or global cognitive impairment of the children at 5 years of age. The proportion of low simultaneous processing scores (Ͻ70) was lower in the group with LDA (7% vs 19% without LDA; P ϭ .04). This association was not significant after adjustment for propensity score, prognostic factors, and social class (adjusted odds ratio [aOR] Learning to protect the preterm brain is a challenging priority in view of the disturbingly high rate of long-term neurosensory, cognitive, and behavioral disabilities in very preterm infants. 1 A large number of studies have examined the multifactorial origin of cerebral lesions (subependymal/intraventricular hemorrhages [SEH/IVH]) and white matter injuries [WMIs]) and later neurodisabilities, which involve acute/subacute ischemic/inflammatory antenatal or perinatal events combined with deprivation of placental hormonal or growth factors caused by preterm birth. 2 Aspirin given to the mother in high-risk pregnancies may cross the placenta. 3 Aspirin is well tolerated by the fetus and seems to produce a moderate reduction of several different risks (preeclampsia, delivery before 37 weeks of gestation, and fetal growth restriction) without increasing infant bleeding. 4 Nevertheless, the long-term effects of aspirin on preterm children are unknown. Aspirin inhibits cyclooxygenase 1 (COX 1) and COX 2. Because COX 2 plays a role in the dendritic arborization involved in the developing areas that are responsible...