The goal of this observational study is to learn about the effects of low dose aspirin in immunity Pregnant women taking aspirin for other reasons (preeclampsia prevention) will be studied. The main question it aims to answer is: evaluate the effect of LDA on the modulation of innate immunity cells (NK cells, monocytes, γδ T cells) and/or acquired immunity (B and T lymphocytes, Treg cells, Th cells). Participants already taking intervention A as part of their regular medical care for RA will answer online survey questions about their joint pain for 5 years.