twin placenta

twin pla·cen·ta

the placenta(s) of a twin pregnancy; if dizygotic, the placentas may be separate or fused, the latter retaining two amnionic and two chorionic sacs (dichorionic diamnionic placenta); if monozygotic, the placenta may be a monochorionic monoamnionic placenta or monochorionic diamnionic placenta, depending on the stage at which twinning took place; if twinning occurs early, there may be a fused placenta with two chorionic and two amnionic membranes.

twin pla·cen·ta

(twin plă-sen'tă)
The placenta(s) of a twin pregnancy; if dizygotic, the placentas may be separate or fused, the latter retaining two amnionic and two chorionic sacs (dichorionic diamnionic placenta); if monozygotic, the placenta may be a monochorionic monoamnionic placenta or monochorionic diamnionic placenta, depending on the stage at which twinning took place; if twinning occurs early, there may be a fused placenta with two chorionic and two amnionic membranes.
References in periodicals archive ?
One single disk twin placenta (case) was included with an appropriately matched twin control.
10,12) Briefly, the MPTR protocol includes processing 5 sections of parenchymal tissue from both singleton and twin placentas for examination.
Pathology of twin placentas with special attention to monochorionic twin placentas.