Expect early delivery. Attempts will be made to keep the condition under control for as long as it is safe to do so. Valuable time may be bought to give your babies a better chance of survival.
Remember, pre-eclampsia is only treated by delivery and whatever measures are instituted while you are pregnant, they are meant just to keep the lid on. If the condition gets worse, in spite of everything thrown at it, delivery becomes inevitable.
Most obstetricians would prefer to get to thirty weeks of gestation or beyond. However, nobody tries to achieve this at any price. Delivery will be carried out when it becomes necessary. In such a situation, a balancing act is essential but maternal wellbeing remains paramount.
What is the likely method of delivery in such a situation?
It depends on a number of factors. If there is no contraindication to vaginal delivery, this will be aimed for. Labour will be induced. If, however, you are too remote from term - let's say below thirty weeks of gestation - induction of labour may be considered not feasible as it is unlikely to succeed in reasonable time. In such a situation, a caesarean delivery is the logical option.
Is there anything else that can be done to contain the situation?
Some people advocate use of a medicine called indomethacin. This is meant to reduce the production of excess fluid and also prevent premature labour by inhibiting uterine contractions. Not everybody agrees. The argument against it is that it hardly works, has the potential to cause heart complications in the fetus and may well cause kidney damage to the donor twin as it works by reducing urine output.