You can do vaginal ultrasound 12 hours after stuffing chenodone, because at this time chenodone in the vaginal secretion, the role of body temperature has long been melted, absorbed by the mucosal tissues, has been in the body to play the effect of the drug, so do vaginal ultrasound on the effectiveness of the drug will not cause a corresponding effect, you can rest assured that the examination. In addition, this drug must be used under the guidance of the doctor, and stuffed into the deep vagina in order to be absorbed, play the effect of the drug. The process of inserting the drug must be aseptic, to avoid pathogenic bacteria with the insertion of the drug into the vagina and cause local inflammation of the vagina, so during the entire period of use of the drug should keep the vulva locally clean, and change underwear. The process of drug insertion should not be interrupted, so as not to cause irregular vaginal bleeding, or lead to the corresponding effect of the drug can not be well exerted, in the clinic to achieve the corresponding therapeutic effect.