Assertion: abnormality | /r/RelatedTo | site
Facets:
value: as with twinning
type: OTHER
Source sentences:
text: Abnormalities can range from anatomical associated with degree or site of inplantation, structure (as with twinning), to placental function, placento-maternal effects (pre-eclampsia, fetal erythroblastosis) and finally mechanical abnormalities associated with the placental (umbilical) cord.