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| A study performed in Japan published in 1995 noted a stunning comparison of twins, triplets and quadruplets per 1000 births. Cerebral palsy rates for singletons 2.5, twins 9, triplets 31, and quadruplets 111. In another study, twins weighing at least 2499 g at birth exhibit cerebral palsy 2.7 times more than a single birth. The correlations are strong, and contribute to an understanding of a multi cause source for many if not most cases of cerebral palsy. Yet there are problems that apply to multiple births specifically, for example the later born of a several child birth is more vulnerable to CP. In addition, twins are more vulnerable to the effects of shortened gestational period than singletons. Last, there are complications during childbirth peculiar to multiple births that can manifest in fetal distress and possible brain damage. Though cerebral palsy appears far more frequently in multiple births, there is no evidence that the severity of impairment is more extreme than a single birth. There are specific forms of cerebral palsy that occur more frequently in multiple births including spastic hemiplegia and spastic diplegia. In an Australian study, evidence was presented that hemiplegia appeared more often even though its not particularly associated with low birth weight like hemiplegia. Stanley, Fiona, Blair, Eve, Alberman, Eva. (2000) Cerebral Palsies: Epidemiology & Causal Pathways. Mac Keith Press |
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