The association between a shared placenta and pregnancy outcome in triplet pregnancies

What is it about?

We compared perinatal outcome and growth discordance between triplet pregnancies with separate placentae (trichorionic triamniotic, TCTA) and those with shared placentae (dichorionic triamniotic (DCTA) or monochorionic triamniotic (MCTA)). We found that monochorionic placentation of a pair or trio in triamniotic triplet pregnancy was associated with a significantly increased stillbirth risk, mainly due to fetofetal transfusion syndrome, and with greater size discordance.

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Why is it important?

As triplet pregnancies are rare, the reported findings from this multicentre study are an important contribution to the available evidence on the outcomes of triplet pregnancies with different type of placentation. Our findings should be valuable for future studies aiming to build a robust evidence base for developing optimal management and timing of delivery in these pregnancies.