Perineal Preparation for Pregnant Ladies.

The participants will receive 3 programs.The educational pelvic floor dysfunction prevention program, pelvic floor muscle exercise program and perineal massage program will be educated by an investigator during the participant visit 4 weeks before her due date

The participants will receive one program. That is the educational pelvic floor dysfunction prevention program.The instructions of the program will be given by an investigator once during the participant visit 4 weeks before her due date.