At some point your doctor may encourage you to consider getting admitted into a hospital for in-patient monitoring. It’s worth noting that not every doctor in every part of the world will suggest this, nor is it considered absolutely required — after all, it’s your baby and your body.
In-patient monitoring helps address one major concern: the possibility that without an amniotic sac separating your twins, their respective cords may twist and tangle into a knot that will reduce blood flow to one or both.
For us, in-patient monitoring involved deciding first when to get admitted. We were told by our doctors that we could go in at any point past 24 weeks of gestation, and that hospital policies required intervention after 25 weeks. This latter point was fairly critical for us because as a couple we were unsure if we were comfortable keeping a pregnancy if the life outcomes for the baby/babies were particularly poor. We were expected to be admitted before 28 weeks, however.
Once admitted, the mother isn’t allowed to leave the hospital premises, something we figured was largely for insurance purposes. Presbyterian St. Luke’s is a sufficiently large hospital that there is an part of the hospital wing dedicated to mothers with complicated pregnancies, and it sits very close to the operating rooms where babies are delivered.