Which of the following oils should be avoided during pregnancy?

Camphor is considered an essential oil that should be avoided during pregnancy due to its potential toxicity and the risk of causing complications. It has a stimulating effect on the central nervous system, which can be particularly harmful in pregnant individuals. High doses can lead to adverse effects such as seizures and should not be used in any form during pregnancy.

In contrast, other options like lavender and frankincense are generally regarded as safe in moderation, though caution is always advised and it’s best to consult healthcare professionals before use. Hyssop, while sometimes noted for caution due to its potential effects on the uterus, is not as widely recognized as a major risk as camphor is. Therefore, camphor stands out as the oil that poses significant risks during pregnancy, making it essential for pregnant individuals to avoid its use.