Adherence to low-dose aspirin regimen led to better pregnancy outcomes in women with previous pregnancy losses

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Close adherence to low-dose aspirin regimen led to better pregnancy outcomes in women with previous pregnancy losses who were trying to conceive. The beneficial effect of aspirin was stronger if women began taking it before pregnancy and weaker if they started taking it after the 6th week of gestation. This per protocol analysis of a randomized controlled trial is published in Annals of Internal Medicine.

In the EAGeR (Effects of Aspirin in Gestation and Reproduction) trial, researchers examined the effects of preconception-initiated low dose aspirin treatment on pregnancy loss and live birth in 1,227 women trying to become pregnant after 1 or 2 pregnancy losses. The trial found that women assigned to taking low-dose aspirin therapy daily before pregnancy did not have better pregnancy outcomes. However, many of the patients in the trial did not strictly adhere to the aspirin protocol, which was not taken into account by the originally published intention-to-treat approach.

Researchers from Emory University and the National Institutes of Health used data from the EAGeR trial to conduct a post hoc per protocol analysis to determine if taking an aspirin almost every day would increase pregnancies or reduce pregnancy losses. The researchers compared the chances of pregnancy, pregnancy loss, and live births that would have occurred under high levels of adherence to aspirin versus placebo.

The per protocol analysis showed that adhering to low-dose aspirin therapy for at least 5 of 7 days per week led to 8 more pregnancies, 6 fewer pregnancy losses, and ultimately 15 more live births for every 100 women in the trial. According to the authors these findings suggest that efforts geared toward improving daily adherence to low dose aspirin may yield improvements in aspirin’s effectiveness on reproductive outcomes for women trying to conceive.


Aspirin may increase pregnancy chances in women with high inflammation, study finds


More information:
Annals of Internal Medicine, https://www.acpjournals.org/doi/10.7326/M20-0469

Annals of Internal Medicine, https://www.acpjournals.org/doi/10.7326/P20-0016

Provided by
American College of Physicians

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Adherence to low-dose aspirin regimen led to better pregnancy outcomes in women with previous pregnancy losses (2021, January 26)
retrieved 26 January 2021
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