What do systematic reviews say?

Heparin plus aspirin vs aspirin

Heparin plus aspirin may leads to higher live birth compared with aspirin (low certainty).

• Aspirin or heparin or both for improving pregnancy outcomes in women with persistent antiphospholipid antibodies and… 2020 · Cochrane Headline outcomes only
  RR 1.27 [1.09, 1.49]
  5 studies · 1295 participants
  Low