| Here goes...twins can be identical (30%) or non identical (70%). Dichorionic means two placentas, and diamniotic means two amniotic fluid filled sacs. A non identical twin pregnancy is always dichorionic diamniotic, which means that your babies, despite both being in your womb at the same time, have their own placenta and amniotic sac. It becomes more complicated with identical twins. They are originally from one embryo that split into two. If the embryo splits very early on, then the twins are identical but have separate placentas and amniotic sacs (dichorionin, diamniotic). If the embryo splits a little later, the result is identical twins that share a placenta (monochorionic) but are in separate sacs (diamniotic). Very late splitting of the embryo is rare but can result in conjoined (siamese) twins, or two babies that have the same placenta and are in the same sac (monochorionic, monoamniotic). This type of twins is at highest risk of various complications of pregnancy. |
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