Although we don't have a 100% confirmation, it is likely that Imogene's hemiparesis was caused by a stroke before she was born. There was a program on NPR yesterday on childhood stroke. It is really interesting. At about 25 minutes in they discuss strokes before or just at birth. If you've got a chance, you might find it worth listening to the show. What caught my attention - about a third of all childhood strokes (according to this doctor) happen before or just around birth, the diagnosis for stroke around birth is usually at 3-6 months (exactly when we saw it first in Imogene) and that recurrence of stroke is much less likely when the stroke occurred at or before birth.