Focusing more specifically on yoga and the first trimester, students may find themselves facing the challenges of nausea and fatigue. Not every woman experiences this, but for those that do, even thinking about physical exercise may be totally out of the question. My personal experience was that yoga helped me through the nausea and fatigue. However (I stress), that is not what others may go through. Another issue that may arise relates to disclosing your pregnancy. While I think it is important to tell your yoga teacher that you are pregnant if you are still taking general classes, you may not feel ready to tell people your news.