Avoiding common obstetrics and gynecology errors 并列题名：Avoiding common obstetrics and gynecology errors Clinical obstetrics and gynecology Diagnosiis in color obstetrics and gynecology Pocket doctor: obstetrics and gynecology Volume of obstetrics and gynecology Ultrasonics on obstetrics and gynecology Practice guidance of obstetrics and gynecology nursing Compact atlas of obstetrics and gynecology ultrasound Textbook of obstetrics and gynecology