Yes, it is possible to use Canesten external cream during pregnancy if you have symptoms of a yeast infection such as white discharge, itching, and mild burning sensation. It is important to make sure that the burning sensation is indeed caused by a yeast infection and not another condition. If you are unsure, your pharmacist can help guide you on the appropriate treatment. If it is confirmed to be a yeast infection, it is recommended to use the Canesten external cream with the ovule for a duration of 7 days, as this formulation is less concentrated and therefore safer during pregnancy to minimize exposure to the fetus.