The Effect of Oral Gan Shuangbi During the Perinatal Period on the Recovery of Intestinal Function After Cesarean Section in Pregnant Women- A Multicenter, Double-blind, Randomized Controlled Clinical Trial

Inclusion Criteria: * Chinese woman who is pregnant with a single fetus * Pregnant women who planned to perform lower section of uterus due to social factors, relative head basin asymmetry, macrosomia, cicatricial uterus and other reasons. Exclusion Criteria: * Gastrointestinal disease or family history * Antibiotic usage during pregnancy * Habit of eating foods with high probiotic content such as yogurt and cheese during pregnancy * Take other probiotics or probiotic drinks during pregnancy regularly * Hypertension, Diabetes Mellitus, Hyperthyroidism, Hypothyroidism, Autoimmune Disease, or Other Endocrine and Metabolic Disease * Transfusion History, Organ Transplantation History or Immunotherapy * Gestational hypertension, gestational diabetes, gestational thyroid dysfunction and other endocrine and metabolic diseases occurred during this pregnancy.