There are three types of<unk>  depending on the cells involved at the time of the error: *Type 1<unk> – The error occurs in a trophoblast cell, and thus only trophoblast cells are affected. This type of<unk>  is most often associated with normal pregnancy outcome. *Type 2<unk> – The error occurs in a non-fetal cell of the inner cell mass. This trisomy is<unk>  to the chorionic villus stroma. This type of<unk>  is described in normal pregnancies and is sometimes associated with delayed growth of the fetus. *Type 3<unk> – Trisomic cells are seen in trophoblast cells and the villus stroma, but are absent in the embryo. This type of<unk>  is more commonly associated with delayed growth in the fetus.
Confined placental mosaicism
Germline mosaicism
Fetal programming
Robertsonian translocation
Uniparental disomy
Transplacental carcinogenesis
Postzygotic mutation
Paternal age effect