LA TIMES - Placentas provide clues about autism risk at birth, study says, Apr 25, 2013

 "Researchers believe they have come up with a way to tell whether a newborn infant has a higher-than-normal risk of developing autism -- by looking for abnormalities in the placenta shortly after birth. The abnormalities in question are called trophoblast inclusions, or TIs. They are created when the placenta doesn’t develop properly, and they are a marker for various genetic abnormalities. When a placental sample is examined on a slide under a microscope, TIs appear as dark blobs."
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