ACOG/SMFM have released guidance aligned with USPSTF regarding the use of low-dose aspirin during pregnancy to prevent preeclampsia. When indicated, low-dose aspirin should be started between 12 to 28 weeks and continued until delivery. Optimally, aspirin usage should begin <16 weeks.
Note: USPSTF does allow for consideration of aspirin prophylaxis if ≥1 moderate risk factor is present and states “Clinicians should use clinical judgment in assessing the risk for preeclampsia and discuss the benefits and harms of low-dose aspirin use with their patients”
In these instances, universal implementation (eg, offering low-dose aspirin to all patients within such practices or institutions) may be medically reasonable
Further, the screening algorithm used includes first-trimester serum markers, including placental growth factor and pregnancy-associated plasma protein-A, as well as uterine artery dopplers, which limits the generalizability to a U.S. population. Therefore, a higher dose or doubling of the available 81-mg dose cannot be recommended at this time.
…biomarkers and ultrasonography cannot accurately predict preeclampsia and should remain investigational.
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