In keeping with other research showing the benefits of breastfeeding for women with autoimmune disease, this case-control study of 245 people with MS from Berlin compared with 296 people without MS, showed that breastfeeding roughly halves the baby's risk of developing MS in later life.

In detailed statistical analysis, they showed that this effect only emerges after four months of breastfeeding.

It would seem a sensible recommendation for women with MS to breastfeed for at least this long, given previous research showing a reduction in relapse rates as well for women with MS while breastfeeding after childbirth.