It is not recommended for pregnant women to put Vicks in their nose. According to the American Pregnancy Association, mentholated products, such as Vicks VapoRub, should be avoided during pregnancy due its potential risk of causing uterine contractions and/or miscarriage. Additionally, there are also concerns that active ingredients such as camphor can be absorbed through the skin and mucous membranes which could lead to adverse effects on the fetus or mother. If you have congestion due to a cold or allergies while pregnant then talk with your health care provider about safe alternatives for relieving your symptoms.