• Catherine Finnegan and Fionnuala M Breathnach.
• Royal College of Surgeons in Ireland, Rotunda Hospital, Parnell Square, Dublin 1, Ireland. catherinefinnegan@rcsi.ie.
• Curr. Diab. Rep. 2020 Nov 24; 20 (12): 76.

Purpose Of ReviewA diagnosis of type I or type 2 diabetes confers heightened risk for virtually every obstetric and perinatal complication, with the incidence of superimposed preeclampsia representing a particularly high-risk scenario. Over the past three decades, studies have investigated the role of aspirin in preeclampsia prevention, yielding some promising results for certain at-risk groups, yet unconvincing evidence of benefit among women with pre-pregnancy diabetes. The purpose of this review is to present the current evidence base for aspirin use in pregnancy as a means of mitigating preeclampsia risk in the setting of pregestational type I or type 2 diabetes.Recent FindingsMeta-analysis data examining low-dose aspirin for preeclampsia prevention in at-risk and low-risk women has demonstrated modest benefit, but subanalyses of cohorts with diabetes have failed to demonstrate a beneficial effect. Evidence is emerging that indicates a benefit only among women who initiate aspirin therapy prior to 16 weeks' gestation, and uncertainty exists surrounding the effective dose. In light of equipoise surrounding the potential role of aspirin for prevention of preeclampsia in women with diabetes, current research is targeted at determining clinical efficacy of aspirin in this high-risk obstetric population.

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