Which of the following is not a reason for stopping an exercise routine for a pregnant woman?

High blood pressure is indeed a critical reason to stop an exercise routine for a pregnant woman because it can lead to serious complications for both the mother and the baby, such as preeclampsia or placental issues. However, it is essential to recognize that severe headaches and excessive fatigue can also be significant indicators of underlying issues during pregnancy, and in some cases, they may also warrant pausing exercise. Severe headaches could suggest potential health concerns like hypertension or stress, while excessive fatigue might indicate overexertion or other health-related issues.

When considering exercise during pregnancy, it's crucial to monitor the woman's overall well-being and medical conditions actively. Since all three reasons—severe headaches, excessive fatigue, and high blood pressure—could potentially signal that the body needs rest or medical evaluation, the correct choice emphasizes the seriousness of high blood pressure in this context. Therefore, understanding these signs helps ensure the safety and health of both the pregnant woman and her developing baby.