What does "chorionicity" mean?

The chorionic status of multiple pregnancies: whether twins in utero share one chorion and placenta (monochorionic) or whether they each have their own (dichorionic).

Chorionicity

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
The chorionic status of multiple pregnancies: whether twins in utero share one chorion and placenta (monochorionic) or whether they each have their own (dichorionic). uncountable

Related phrases

in utero

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.