618 anesthesia anesthesiainobstetrics anesthetics birthinjuries breechdelivery cesareansection complications control delivery etc female fetalheartratemonitoring genitaldiseases gynecology handbooks labor labor(obstetrics) manuals methods midwifery obstetric obstetrical obstetrics pregnancy pregnancycomplications prevention therapy wo450o1411999 women'shealth wq100j651999 wq330r5951977 wq39m2942000