Hello and I hope I can help you today. Baby aspirin (81 mg dose) is literally an aspirin dose that is safe for children. It is commonly prescribed during pregnancy as a mild blood thinner for prevention of different disorders during pregnancy, like recurrent miscarriage, preeclampsia and others. It is very safe and even though it is not recommended to take adult dose aspirin during pregnancy, this dose is safe and also may help the prognosis of your current pregnancy. So you need not worry at all about the medication and its effects on the baby. However, it concerns me that you are being treated with this medication without actually knowing the cause of death of your last child. I do not know if an autopsy was performed on the baby or if you had any tests after the baby died. Stillbirth can be caused by a number of factors, some due to maternal clotting disorders, infection, birth defects or complications with the pregnancy itself that may not be helped or prevented by just taking aspirin. In addition, many practitioners would recommend monitoring of your baby s heartbeat in the doctors office on a regular basis (non-stress test) to watch for any signs of distress before the baby is born. So in summary, the aspirin you were prescribed is safe but may not be beneficial to you if the death of your baby was unexplained. Tests like screening of your blood for thrombophilias (inherited disorders of blood clotting) and infections (TORCH titers) really should be done if you haven t done so already to make sure that your aspirin treatment is not the only thing that can be done to help prevent complications with this pregnancy. Consultation with a high-risk pregnancy doctor (also called a Perinatologist) may be helpful in figuring out if you have a condition that can adversely affect this pregnancy. I hope that this information was helpful and that I was able to answer your question. Best wishes for the rest of your pregnancy, Dr. Brown