dystocia labor malpresentation operative disporoportion cephalopelvic cesarean section cps shoulder breech transverse lie lie unstable preterm preterm labor cervical insufficiency gestational hypertension and preeclampsia gestational hypertension preeclampsia rhig anti d cde sensitization rh red cell alloimmunization perineum ovary uterus overweight underweight obesity taps ttts siugr multiple pregnancy maneuver leopold obstetrics gyn obgyn physical examination history beta alpha thalassemia gamma x ray radiotherapy augmentation pitocin induction fórceps vacuum delivery vaginal pelvic
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