Many mothers who have given birth know that when giving birth, the doctor has to make an incision in their \”lower body\”, which is called an episiotomy in medicine. So, what are the clinical conditions for pregnant women who require episiotomy? When a pregnant woman gives birth, the folds of the inner vaginal mucosa are fully unfolded and the middle muscle layer is fully expanded, so that the fetus can leave the uterus, pass through the vagina, and come to the human world. Although the anatomical and physiological characteristics of the vagina are conducive to the smooth delivery of the fetus, in fact, when the fetal head with a diameter of about 10 cm is delivered, if there is no