Where cardiac arrest occurs in a pregnant woman, irrespective of the condition of the fetus, the procedure should be performed immediately if basic and advanced life support attempts are proving unsuccessful at achieving return of spontaneous circulation, and the woman's uterus is deemed capable of causing aortocaval compression. The threshold for this is passed when the uterus is so large that the fundus may be palpated at the level of the woman's umbilicus; for a singleton pregnancy, this occurs at around 20 weeks of gestational age (but may be earlier in multiple pregnancy). Although<unk>  is crucial for resuscitation of the mother in such situations, if the gestational age is less than approximately 24 to 25 weeks the procedure will necessarily lead to sacrifice of the fetus (or fetuses), as this is estimated to be the lower limit for fetal viability. If the fetus is over 24 weeks' gestation, Caesarean delivery also offers the best chance of rescue for the neonate. If the mother's medical condition is such that there is no reasonable prospect of maternal resuscitation or viability (for example, after a nonsurvivable injury, or an unwitnessed arrest with prolonged pulselessness), then the procedure may be attempted immediately as a means of saving the unborn fetus primarily.
Resuscitative hysterotomy
Uterine balloon tamponade
Tubal ligation
Tubal reversal
Lower segment Caesarean section
Cervical cerclage
Labor induction
Trial of labour