Giving birth seems to slow the progression of multiple sclerosis (MS), Belgian and Dutch researchers say.
The researchers tracked 330 women with MS for 18 years and found that among those who had children, severe disability took longer to develop.
Writing in the Journal of Neurology, Neurosurgery and Psychiatry, they say previous studies have suggested a worsening of MS just after birth.
But the MS Society said the study was flawed and further research was needed.
MS is a long-term inflammatory condition of the central nervous system.
It affects the transfer of messages from the nervous system to the rest of the body.
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