////////////First trimester. During the first trimester, higher doses of aspirin may raise the risk of pregnancy loss. Taking a high dose also could raise the risk of a baby having medical conditions present at birth, called congenital defects.
Second trimester. The U.S. Food and Drug Administration, also known as the FDA, advises pregnant people not to take aspirin, ibuprofen (Advil, Motrin IB, others) or naproxen sodium (Aleve) after 19 weeks of pregnancy. Taking these medicines could cause rare but serious kidney conditions in a fetus. That can lead to low levels of amniotic fluid. And that can cause more problems for the fetus.//////////////////////
https://www.mayoclinic.org/healthy-life ... q-20058167