Breast-feeding may reduce XXXX risk.

@entity1 @entity5 @entity0
A case control study of 6000 @entity1 with @entity0 and about 8000 @entity1 with @entity5 living in Maine, Massachusetts, New Hampshire, and Wisconsin found that younger @entity1 who breast feed are at a 20% lower risk of developing @entity0 before menopause than those who have never breast fed or have breast fed only briefly. The younger a @entity1 was when she first breast fed, the less likely she was to develop @entity0 . The length of total time a @entity1 breast fed in her life was inversely related to the risk of developing @entity0 before menopause. For example, if a @entity1 breast feeds for 4-12 months, the risk of developing @entity0 in premenopausal @entity1 is reduced 11% when compared to @entity1 who breast feed for less than 3 months and those who do not breast feed. The risk can be reduced by about 25%, if @entity1 breast feed for at least 2 years. Neither young age nor long duration of total time breast feeding appeared to influence the risk of developing @entity0 after menopause, however. One hypothesis is that breast feeding suppresses the production of ovarian hormones which may be associated with @entity0 . Since most @entity0 cases in the US are postmenopausal, the @entity0 cases would be rather small, however. Another study of about 90,000 US nurses found no relationship between breast feeding and @entity0 . The lack of a relationship may have been due to the fact that the nurses were much less likely to breast feed at a young age since they had a high educational level. Further, breast feeding practices have changed in the last 20-30 years from feeding every 4 hours to feeding on demand. In India most rural @entity1 breast feed, beginning when they are young. They even practice communal breast feeding, which allows @entity1 to work outside their homes.
