Aspirin administration from early pregnancy versus initiation after 11 weeks of gestation for prevention of pre-eclampsia in high-risk pregnant women: Study protocol for randomized controlled trial.

Background: Pre-eclampsia (PE) is a multiorgan disorder that affects 2-5% of all pregnant women. Present recommendations for when to start aspirin in high-risk women are after 11 wk of gestation.

Objective: We present a protocol to investigate the effectiveness of aspirin use from early pregnancy, which is a randomized controlled trial to assess whether prescribed low-dose aspirin from early pregnancy reduces the prevalence of early and late-onset PE.