Pathology of higher multiple gestations: triplets
Clinical signs
- cca 1 : 10 000 of spontaneous conceptions
- the number has markedly increased with techniques of assisted reproduction
- triplets may be trizygotic, dizygotic or monozygotic, and so the forms of
placentation vary:
- two fetuses from triplets are commonly monozygotic twins
- monozygotic triplets are the least frequent, this is explained as resorbtion
of the fourth embryo or a delay , asynchronism, in one of the cell divisions, providing that
binary divisions stands as the principal rule
- triplet placenta is described using the numbers of chorions and amnions, for
example trichorionic triamnionic, dichorionic triamnionic
- clinical problems are the same as for twins
- triplets are always born premature
Trichorial triamnial triplets (73346)
Pictures
Triplet placenta monochorionic triamnionic and histology of the septum:
Placenta, triplets, Macro, autopsy (72668)
Amniotic membranes, septum, triplets, HE 40x (72651)
Triplet placenta triamnionic trichorial:
Triplets, trichorial triamnial, Macro, autopsy (73345)
Triplets, trichorial triamnial:
Triplets, trichorial triamnial, Macro, autopsy (73346)