Hey Malu,
Cerebral palsy is a condition with motor disorders (delayed development or paralyses), it's often accompanied by mental retardation or seizures.
It can be caused by a wide variety of complications during delivery or in utero.
Yvonne, Rivka already supplied the complications that I would have suggested. If I think of any other ones I'll let you know. And if you need any other specifics or anything, you can e-mail me.
Jill