Yes, it is possible to use lime essential oil during pregnancy. However, it is recommended that you don't take more than the recommended amount as it may increase the risk of miscarriage. In addition, some people have reported having allergic reactions to citrus fruit juices and oils which can result in symptoms such as stomach cramps or vomiting although other people do not experience any adverse reactions. If you are pregnant or trying for a baby then consult your healthcare practitioner before using these oils.