<prompt> True about vacuum extraction of fetus:Can be used in nondilated cervixCan be used in incompletely dilated cervixUsed in face presentationApplied 3 cm posterior to anterior fontanel  <response>: indications fetal distress in second stage Maternal distress in second stage Prolonged second stage Deep transverse arrest and persistent occipito-posterior High vacuum for second twin refer pgno: 447 textbook of obstetrics sheila 2 nd edition 