Do not use vaginal pills in the first trimester of pregnancy, as the embryo is still unstable, and once the pills are used to stimulate the contraction of the uterus, it may cause a preterm or inevitable miscarriage. If you are uncomfortable, you must go to the hospital to have the appropriate examination, and according to the results of the examination, you should use the medication, and only under the guidance of the doctor to avoid serious consequences. It is recommended that pregnant women should keep their vulva clean and wash it with warm water once a day in the morning and once in the evening to reduce the chance of infection, and change their underwear regularly and wear cotton underwear. After the middle of pregnancy, you can insert vaginal pills, but you must be gentle to avoid stimulating the contraction of the uterus.