There are several commonly used synonyms for the phrase "avoid exposure during pregnancy." One of the most popular ones is to "minimize contact" with any potentially harmful substances or situations that could harm the growing fetus. Another common synonym is to "limit exposure," meaning that pregnant women should strive to reduce the amount of time spent in environments where there is a high risk of exposure to harmful chemicals or other toxins. Some other acceptable synonyms for "avoid exposure during pregnancy" include "reduce risk," "stay away from," and "mitigate potential harm." Overall, the important thing is for pregnant women to take every precaution necessary to protect their unborn child's health.