I had no indication or reason to take a low dose aspirin, since my m/c with my OE I decided to do what ever I could to stay pregnant since we had no idea why I m/c other then poor eggs. But I asked if I could for peace of mind and my RE said it was ok, he told me my OB would tell me when to stop. The low dose aspirin will not hurt you at all, it will just thin your blood to discourage clots and encourage good blood flow. I doubt your RE will say no since its harmless in such a low dosage. But make sure you ask about it and do your research on line about the benefits or drawbacks of low dose aspirin during your first trimester.