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What are the symptoms of APS

APS can cause both low-grade symptoms and potentially fatal events as a result of blood clots.

In pregnancy, APS is the most common, potentially treatable cause of recurrent miscarriage, and is also associated with other complications such as pre-eclampsia, low weight babies and stillbirth.

Some people are affected by symptoms more than others while others simply have the antiphospholipid antibodies (aPL) in their blood but do not develop any blood clots, experience pregnancy complications or display any symptoms at all. As of yet, we simply don’t know the reason why these anomalies exist because so much research still needs to be carried out.

The typical low-grade symptoms of APS are:

The common acute events caused by APS are:

As APS is a blood disorder and blood flows throughout the entire body, nearly any organ can be affected. Consequently, the brain, eyes, ears, lungs, heart, kidneys, liver, bowel, skin, nails, bones and joints can potentially all be affected to varying degrees.

Remember - it is NOT necessary to have all the symptoms to be diagnosed with APS.

The brain

With APS, the brain is often affected and symptoms can range from recurrent headaches to serious strokes.


APS is usually associated with recurrent miscarriage, but it can also cause other pregnancy complications. View our overview of pregnancy problems.

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